| Condensed Consolidated Statement 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, 2017 | $ 22 | $ 74,959 | $ 205,788 | $ (34,434) | $ 0 | $ 246,335 | $ 12,678 | $ 259,013 | 
| Balance (in shares) at Dec. 31, 2017 | 21,631 | 3,105 | ||||||
| Net income | $ 0 | $ 0 | 0 | 3,257 | 0 | 3,257 | 28 | 3,285 | 
| Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 1,237 | 1,237 | 
| Dividends to common stockholders | 0 | 0 | 0 | (8,651) | 0 | (8,651) | 0 | (8,651) | 
| 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 | (939) | (939) | 
| OP Units issued to third parties | 0 | 0 | 0 | 0 | 0 | 0 | 4,742 | 4,742 | 
| LTIP Units redeemed for cash | 0 | 0 | 0 | 0 | 0 | 0 | (263) | (263) | 
| Balances at Jun. 30, 2018 | $ 22 | $ 74,959 | 205,788 | (42,739) | 0 | 238,030 | 17,483 | 255,513 | 
| Balances (in shares) at Jun. 30, 2018 | 21,631 | 3,105 | ||||||
| Balances at Dec. 31, 2017 | $ 22 | $ 74,959 | 205,788 | (34,434) | 0 | 246,335 | 12,678 | 259,013 | 
| Balance (in shares) at Dec. 31, 2017 | 21,631 | 3,105 | ||||||
| Balances at Dec. 31, 2018 | $ 26 | $ 74,959 | 243,038 | (45,007) | (3,721) | 269,295 | 30,455 | 299,750 | 
| Balances (in shares) at Dec. 31, 2018 | 25,944 | 3,105 | ||||||
| Balances at Mar. 31, 2018 | $ 22 | $ 74,959 | 205,788 | (38,349) | 0 | 242,420 | 12,323 | 254,743 | 
| Balance (in shares) at Mar. 31, 2018 | 21,631 | 3,105 | ||||||
| Net income | $ 0 | $ 0 | 0 | 1,391 | 0 | 1,391 | (7) | 1,384 | 
| Stock-based compensation expense | 0 | 0 | 0 | 0 | 0 | 0 | 1,055 | 1,055 | 
| Dividends to common stockholders | 0 | 0 | 0 | (4,325) | 0 | (4,325) | 0 | (4,325) | 
| 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 | (525) | (525) | 
| OP Units issued to third parties | 0 | 0 | 0 | 0 | 0 | 0 | 4,742 | 4,742 | 
| LTIP Units redeemed for cash | 0 | 0 | 0 | 0 | 0 | 0 | (105) | (105) | 
| Balances at Jun. 30, 2018 | $ 22 | $ 74,959 | 205,788 | (42,739) | 0 | 238,030 | 17,483 | 255,513 | 
| Balances (in shares) at Jun. 30, 2018 | 21,631 | 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 | ||||||
| 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 | 0 | ||||||
| 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 | 0 | ||||||
| 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 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 | 
| LTIP Units and OP Units redeemed for common stock (in shares) | 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 |