INTERIM CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Interest Rate Swap	Common Stock	Treasury Stock	Paid-in Capital	Accumulated Deficit	Accumulated Deficit Interest Rate Swap	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Interest Rate Swap
Balance (in shares) at Dec. 31, 2019			6,908	232
Balance at Dec. 31, 2019	$ (36,916)		$ 69	$ (2,500)	$ 24,026	$ (59,079)		$ 568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(753)					(753)
Issuance of equity grants, net (in shares)			190
Issuance of equity grants, net	4		$ 1		3
Interest rate cash flow hedge		$ (279)							$ (279)
Stock-based compensation	338				338
Balance (in shares) at Mar. 31, 2020			7,098	232
Balance at Mar. 31, 2020	(37,606)		$ 70	$ (2,500)	24,367	(59,832)		289
Balance (in shares) at Dec. 31, 2019			6,908	232
Balance at Dec. 31, 2019	(36,916)		$ 69	$ (2,500)	24,026	(59,079)		568
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	699
Interest rate cash flow hedge	(220)
Balance (in shares) at Jun. 30, 2020			7,075	232
Balance at Jun. 30, 2020	(36,018)		$ 70	$ (2,500)	24,444	(58,380)		348
Balance (in shares) at Mar. 31, 2020			7,098	232
Balance at Mar. 31, 2020	(37,606)		$ 70	$ (2,500)	24,367	(59,832)		289
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,452					1,452
Interest rate cash flow hedge	59	59							59
Cancellation of equity grants, net (in shares)			(23)
Cancellation of equity grants, net	0
Stock-based compensation	77				77
Balance (in shares) at Jun. 30, 2020			7,075	232
Balance at Jun. 30, 2020	(36,018)		$ 70	$ (2,500)	24,444	(58,380)		348
Balance (in shares) at Dec. 31, 2020			7,079	232
Balance at Dec. 31, 2020	(31,305)		$ 71	$ (2,500)	24,596	(53,510)		38
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,888					1,888
Issuance of equity grants, net (in shares)			106
Issuance of equity grants, net	64		$ 1		63
Interest rate cash flow hedge		29					$ 38		(9)
Stock-based compensation	95				95
Balance (in shares) at Mar. 31, 2021			7,185	232
Balance at Mar. 31, 2021	(29,229)		$ 72	$ (2,500)	24,754	(51,584)		29
Balance (in shares) at Dec. 31, 2020			7,079	232
Balance at Dec. 31, 2020	(31,305)		$ 71	$ (2,500)	24,596	(53,510)		38
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	4,382
Interest rate cash flow hedge	(20)
Balance (in shares) at Jun. 30, 2021			7,181	232
Balance at Jun. 30, 2021	(26,650)		$ 71	$ (2,500)	24,851	(49,090)		18
Balance (in shares) at Mar. 31, 2021			7,185	232
Balance at Mar. 31, 2021	(29,229)		$ 72	$ (2,500)	24,754	(51,584)		29
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,494					2,494
Interest rate cash flow hedge	(11)	$ (11)							$ (11)
Cancellation of equity grants, net (in shares)			(4)
Cancellation of equity grants, net	(1)		$ (1)
Stock-based compensation	97				97
Balance (in shares) at Jun. 30, 2021			7,181	232
Balance at Jun. 30, 2021	$ (26,650)		$ 71	$ (2,500)	$ 24,851	$ (49,090)		$ 18