INTERIM CONSOLIDATED STATEMENTS OF SHAREHOLDERS' DEFICIT - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Treasury Stock	Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)
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	3,498
Interest rate cash flow hedge	(115)
Balance (in shares) at Sep. 30, 2020		7,081	232
Balance at Sep. 30, 2020	(33,038)	$ 70	$ (2,500)	24,520	(55,581)	453
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
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	2,799				2,799
Issuance of equity grants, net (in shares)		6
Issuance of equity grants, net	0
Interest rate cash flow hedge	105					105
Stock-based compensation	76			76
Balance (in shares) at Sep. 30, 2020		7,081	232
Balance at Sep. 30, 2020	(33,038)	$ 70	$ (2,500)	24,520	(55,581)	453
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	779
Interest rate cash flow hedge	(33)
Balance (in shares) at Sep. 30, 2021		7,181	232
Balance at Sep. 30, 2021	(30,170)	$ 71	$ (2,500)	24,947	(52,693)	5
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)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	(3,603)				(3,603)
Interest rate cash flow hedge	(13)					(13)
Stock-based compensation	96			96
Balance (in shares) at Sep. 30, 2021		7,181	232
Balance at Sep. 30, 2021	$ (30,170)	$ 71	$ (2,500)	$ 24,947	$ (52,693)	$ 5