CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands		Common Stock	Additional Paid-In Capital	Treasury Stock	Accumulated Deficit	Accumulated Other Comprehensive Loss	Total
Balance at beginning of period at Dec. 31, 2019		$ 376	$ 134,217	$ (55,731)	$ (19,724)	$ (3,174)	$ 55,964
Balance at beginning of period (in shares) at Dec. 31, 2019		37,612		(5,731)
Net loss attributable to common stockholders					4,333		4,333
Settlement of stock awards		$ 5		$ (701)			(696)
Settlement of stock awards (in shares)		543		(222)
Unrealized gain on pension liability						1,015	1,015
Stock-based compensation			1,163				1,163
Stock-based consulting fees		$ 2	598				600
Stock-based consulting fees (in shares)		190
Stock buy-back				$ (359)			(359)
Stock buy-back (in shares)				(220)
Balance at Dec. 31, 2020	[1]	$ 383	135,978	$ (56,791)	(15,391)	(2,159)	62,020
Balance (in shares) at Dec. 31, 2020	[1]	38,345		(6,173)
Net loss attributable to common stockholders					(7,419)		(7,419)
Settlement of stock awards		$ 5		$ (375)			(370)
Settlement of stock awards (in shares)		496		(225)
Unrealized gain on pension liability						119	119
Stock-based compensation			173				173
Balance at Mar. 31, 2021	[1]	$ 388	136,151	$ (57,166)	(22,810)	(2,040)	54,523
Balance (in shares) at Mar. 31, 2021	[1]	38,841		(6,398)
Balance at beginning of period at Dec. 31, 2020	[1]	$ 383	135,978	$ (56,791)	(15,391)	(2,159)	62,020
Balance at beginning of period (in shares) at Dec. 31, 2020	[1]	38,345		(6,173)
Net loss attributable to common stockholders					(13,853)		(13,853)
Settlement of stock awards		$ 6		$ (375)			(369)
Settlement of stock awards (in shares)		508		(225)
Unrealized gain on pension liability						237	237
Stock-based compensation			351				351
Balance at Jun. 30, 2021		$ 389	136,329	$ (57,166)	(29,244)	(1,922)	48,386
Balance (in shares) at Jun. 30, 2021		38,853		(6,398)
Balance at beginning of period at Dec. 31, 2020	[1]	$ 383	135,978	$ (56,791)	(15,391)	(2,159)	62,020
Balance at beginning of period (in shares) at Dec. 31, 2020	[1]	38,345		(6,173)
Net loss attributable to common stockholders					(17,461)		(17,461)
Sale of common stock		$ 2	165				167
Sale of common stock (in shares)		150
Settlement of stock awards		$ 5		$ (375)			(370)
Settlement of stock awards (in shares)		521		(225)
Unrealized gain on pension liability						356	356
Stock-based compensation			529				529
Balance at Sep. 30, 2021		$ 390	136,672	$ (57,166)	(32,852)	(1,803)	45,241
Balance (in shares) at Sep. 30, 2021		39,016		(6,398)
Balance at beginning of period at Dec. 31, 2020	[1]	$ 383	135,978	$ (56,791)	(15,391)	(2,159)	62,020
Balance at beginning of period (in shares) at Dec. 31, 2020	[1]	38,345		(6,173)
Net loss attributable to common stockholders					(20,805)		(20,805)
Sale of common stock		$ 42	7,597				7,639
Sale of common stock (in shares)		4,144
Settlement of stock awards		$ 5		$ (375)			(370)
Settlement of stock awards (in shares)		535		(225)
Unrealized gain on pension liability						816	816
Stock-based compensation			707				707
Balance at Dec. 31, 2021		$ 430	144,282	$ (57,166)	(36,196)	(1,343)	50,007
Balance (in shares) at Dec. 31, 2021		43,024		(6,398)
Balance at beginning of period at Mar. 31, 2021	[1]	$ 388	136,151	$ (57,166)	(22,810)	(2,040)	54,523
Balance at beginning of period (in shares) at Mar. 31, 2021	[1]	38,841		(6,398)
Net loss attributable to common stockholders					(6,434)		(6,434)
Settlement of stock awards		$ 1					1
Settlement of stock awards (in shares)		12
Unrealized gain on pension liability						118	118
Stock-based compensation			178				178
Balance at Jun. 30, 2021		$ 389	136,329	$ (57,166)	(29,244)	(1,922)	48,386
Balance (in shares) at Jun. 30, 2021		38,853		(6,398)
Net loss attributable to common stockholders					(3,608)		(3,608)
Sale of common stock		$ 1	165				166
Sale of common stock (in shares)		150
Settlement of stock awards (in shares)		13
Unrealized gain on pension liability						119	119
Stock-based compensation			178				178
Balance at Sep. 30, 2021		$ 390	136,672	$ (57,166)	(32,852)	(1,803)	45,241
Balance (in shares) at Sep. 30, 2021		39,016		(6,398)
Balance at beginning of period at Dec. 31, 2021		$ 430	144,282	$ (57,166)	(36,196)	(1,343)	50,007
Balance at beginning of period (in shares) at Dec. 31, 2021		43,024		(6,398)
Net loss attributable to common stockholders					(5,131)		(5,131)
Settlement of stock awards		$ 4		$ (295)			(291)
Settlement of stock awards (in shares)		364		(153)
Unrealized gain on pension liability						119	119
Stock-based compensation			169				169
Balance at Mar. 31, 2022		$ 434	144,451	$ (57,461)	(41,327)	(1,224)	44,873
Balance (in shares) at Mar. 31, 2022		43,388		(6,551)
Balance at beginning of period at Dec. 31, 2021		$ 430	144,282	$ (57,166)	(36,196)	(1,343)	50,007
Balance at beginning of period (in shares) at Dec. 31, 2021		43,024		(6,398)
Net loss attributable to common stockholders					(5,354)		(5,354)
Settlement of stock awards		$ 4		$ (295)			(291)
Settlement of stock awards (in shares)		367		(143)
Unrealized gain on pension liability						237	237
Stock-based compensation			298				298
Balance at Jun. 30, 2022		$ 434	144,580	$ (57,461)	(41,550)	(1,106)	44,897
Balance (in shares) at Jun. 30, 2022		43,391		(6,541)
Balance at beginning of period at Mar. 31, 2022		$ 434	144,451	$ (57,461)	(41,327)	(1,224)	44,873
Balance at beginning of period (in shares) at Mar. 31, 2022		43,388		(6,551)
Net loss attributable to common stockholders					(223)		(223)
Settlement of stock awards (in shares)		3		10
Unrealized gain on pension liability						118	118
Stock-based compensation			129				129
Balance at Jun. 30, 2022		$ 434	$ 144,580	$ (57,461)	$ (41,550)	$ (1,106)	$ 44,897
Balance (in shares) at Jun. 30, 2022		43,391		(6,541)

[1] (b) Amounts are Revised. See Note 14 for more information