| Condensed Consolidated Statements of Equity - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] | Preferred Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member] | Accumulated Other Comprehensive Loss [Member] | Global Medial REIT Inc. Stockholders' Equity [Member] | Noncontrolling Interest [Member] | Total | 
|---|---|---|---|---|---|---|---|---|
| Balances at Dec. 31, 2018 | $ 26 | $ 74,959 | $ 243,038 | $ (45,007) | $ (3,721) | $ 269,295 | $ 30,455 | $ 299,750 | 
| Balance (in shares) at Dec. 31, 2018 | 25,944 | 3,105 | ||||||
| Net income | $ 0 | $ 0 | 0 | 4,343 | 0 | 4,343 | 162 | 4,505 | 
| Issuance of shares of common stock, net | $ 9 | 0 | 79,258 | 0 | 0 | 79,267 | 0 | 79,267 | 
| Issuance of shares of common stock, net (in shares) | 8,652 | |||||||
| LTIP Units and OP Units redeemed for common stock | $ 0 | 0 | 576 | 0 | 0 | 576 | (576) | 0 | 
| LTIP Units and OP Units redeemed for common stock (in shares) | 57 | |||||||
| Change in fair value of interest rate swap agreements | $ 0 | 0 | 0 | 0 | (5,572) | (5,572) | 0 | (5,572) | 
| Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 1,625 | 1,625 | 
| Dividends to common stockholders | 0 | 0 | 0 | (13,822) | 0 | (13,822) | 0 | (13,822) | 
| Dividends to preferred stockholders | 0 | 0 | 0 | (2,911) | 0 | (2,911) | 0 | (2,911) | 
| Dividends to noncontrolling interest | 0 | 0 | 0 | 0 | 0 | 0 | (1,745) | (1,745) | 
| OP Units issued to third parties | 0 | 0 | 0 | 0 | 0 | 0 | 506 | 506 | 
| Balances at Jun. 30, 2019 | $ 35 | $ 74,959 | 322,872 | (57,397) | (9,293) | 331,176 | 30,427 | 361,603 | 
| Balances (in shares) at Jun. 30, 2019 | 34,653 | 3,105 | ||||||
| Balances at Dec. 31, 2018 | $ 26 | $ 74,959 | 243,038 | (45,007) | (3,721) | 269,295 | 30,455 | 299,750 | 
| Balance (in shares) at Dec. 31, 2018 | 25,944 | 3,105 | ||||||
| Balances at Dec. 31, 2019 | $ 44 | $ 74,959 | 433,330 | (71,389) | (6,674) | 430,270 | 30,083 | 460,353 | 
| Balances (in shares) at Dec. 31, 2019 | 43,806 | 3,105 | ||||||
| Balances at Mar. 31, 2019 | $ 35 | $ 74,959 | 322,359 | (51,390) | (5,743) | 340,220 | 30,342 | 370,562 | 
| Balance (in shares) at Mar. 31, 2019 | 34,555 | 3,105 | ||||||
| Net income | $ 0 | $ 0 | 0 | 2,359 | 0 | 2,359 | 103 | 2,462 | 
| Issuance of shares of common stock, net | $ 0 | 0 | 513 | 0 | 0 | 513 | 0 | 513 | 
| Issuance of shares of common stock, net (in shares) | 98 | |||||||
| LTIP Units and OP Units redeemed for common stock | $ 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 
| Change in fair value of interest rate swap agreements | 0 | 0 | 0 | 0 | (3,550) | (3,550) | 0 | (3,550) | 
| Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 854 | 854 | 
| Dividends to common stockholders | 0 | 0 | 0 | (6,911) | 0 | (6,911) | 0 | (6,911) | 
| Dividends to preferred stockholders | 0 | 0 | 0 | (1,455) | 0 | (1,455) | 0 | (1,455) | 
| Dividends to noncontrolling interest | 0 | 0 | 0 | 0 | 0 | 0 | (872) | (872) | 
| Balances at Jun. 30, 2019 | $ 35 | $ 74,959 | 322,872 | (57,397) | (9,293) | 331,176 | 30,427 | 361,603 | 
| Balances (in shares) at Jun. 30, 2019 | 34,653 | 3,105 | ||||||
| Balances at Dec. 31, 2019 | $ 44 | $ 74,959 | 433,330 | (71,389) | (6,674) | 430,270 | 30,083 | 460,353 | 
| Balance (in shares) at Dec. 31, 2019 | 43,806 | 3,105 | ||||||
| Net income | $ 0 | $ 0 | 0 | 4,369 | 0 | 4,369 | 120 | 4,489 | 
| Issuance of shares of common stock, net | $ 1 | 0 | 13,803 | 0 | 0 | 13,804 | 0 | 13,804 | 
| Issuance of shares of common stock, net (in shares) | 1,239 | |||||||
| LTIP Units and OP Units redeemed for common stock | $ 1 | $ 0 | 15,474 | 0 | 0 | 15,475 | (15,475) | 0 | 
| LTIP Units and OP Units redeemed for common stock (in shares) | 1,207 | 0 | ||||||
| Change in fair value of interest rate swap agreements | $ 0 | $ 0 | 0 | 0 | (14,980) | (14,980) | 0 | (14,980) | 
| Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 1,819 | 1,819 | 
| Dividends to common stockholders | 0 | 0 | 0 | (18,106) | 0 | (18,106) | 0 | (18,106) | 
| Dividends to preferred stockholders | 0 | 0 | 0 | (2,911) | 0 | (2,911) | 0 | (2,911) | 
| Dividends to noncontrolling interest | 0 | 0 | 0 | 0 | 0 | 0 | (1,759) | (1,759) | 
| Balances at Jun. 30, 2020 | $ 46 | $ 74,959 | 462,607 | (88,037) | (21,654) | 427,921 | 14,788 | 442,709 | 
| Balances (in shares) at Jun. 30, 2020 | 46,252 | 3,105 | ||||||
| Balances at Mar. 31, 2020 | $ 44 | $ 74,959 | 440,220 | (78,990) | (20,632) | 415,601 | 23,189 | 438,790 | 
| Balance (in shares) at Mar. 31, 2020 | 44,278 | 3,105 | ||||||
| Net income | $ 0 | $ 0 | 0 | 1,659 | 0 | 1,659 | 13 | 1,672 | 
| Issuance of shares of common stock, net | $ 1 | 0 | 13,803 | 0 | 0 | 13,804 | 0 | 13,804 | 
| Issuance of shares of common stock, net (in shares) | 1,239 | |||||||
| LTIP Units and OP Units redeemed for common stock | $ 1 | 0 | 8,584 | 0 | 0 | 8,585 | (8,585) | 0 | 
| LTIP Units and OP Units redeemed for common stock (in shares) | 735 | |||||||
| Change in fair value of interest rate swap agreements | $ 0 | 0 | 0 | 0 | (1,022) | (1,022) | 0 | (1,022) | 
| Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 897 | 897 | 
| Dividends to common stockholders | 0 | 0 | 0 | (9,250) | 0 | (9,250) | 0 | (9,250) | 
| Dividends to preferred stockholders | 0 | 0 | 0 | (1,456) | 0 | (1,456) | 0 | (1,456) | 
| Dividends to noncontrolling interest | 0 | 0 | 0 | 0 | 0 | 0 | (726) | (726) | 
| Balances at Jun. 30, 2020 | $ 46 | $ 74,959 | $ 462,607 | $ (88,037) | $ (21,654) | $ 427,921 | $ 14,788 | $ 442,709 | 
| Balances (in shares) at Jun. 30, 2020 | 46,252 | 3,105 |