Restatement and Revision of Previously Issued Consolidated Financial Statements - Equity Statement (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended							6 Months Ended			9 Months Ended		12 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021		Mar. 31, 2021		Jun. 30, 2022	Jun. 30, 2021		Sep. 30, 2021		Dec. 31, 2021		Dec. 31, 2020
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ 44,873	$ 50,007	$ 48,386	$ 54,523	[1]	$ 62,020	[1]	$ 50,007	$ 62,020	[1]	$ 62,020	[1]	$ 62,020	[1]	$ 55,964
Net loss attributable to common stockholders	(223)	(5,131)	(3,608)	(6,434)		(7,419)		(5,354)	(13,853)		(17,461)		(20,805)		4,333
Sale of common stock			166								167		7,639
Settlement of stock awards		(291)		1		(370)		(291)	(369)		(370)		(370)		(696)
Unrealized gain on pension liability	118	119	119	118		119		237	237		356		816		1,015
Stock-based compensation	129	169	178	178		173		298	351		529		707		1,163
Stock-based consulting fees															600
Stock buy-back															(359)
Balance	44,897	44,873	45,241	48,386		54,523	[1]	44,897	48,386		45,241		50,007		62,020	[1]
Common Stock
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ 434	$ 430	$ 389	$ 388	[1]	$ 383	[1]	$ 430	$ 383	[1]	$ 383	[1]	$ 383	[1]	$ 376
Balance at beginning of period (in shares)	43,388	43,024	38,853	38,841	[1]	38,345	[1]	43,024	38,345	[1]	38,345	[1]	38,345	[1]	37,612
Sale of common stock			$ 1								$ 2		$ 42
Sale of common stock (in shares)			150								150		4,144
Settlement of stock awards		$ 4		$ 1		$ 5		$ 4	$ 6		$ 5		$ 5		$ 5
Settlement of stock awards (in shares)	3	364	13	12		496		367	508		521		535		543
Stock-based consulting fees															$ 2
Stock-based consulting fees (in shares)															190
Balance	$ 434	$ 434	$ 390	$ 389		$ 388	[1]	$ 434	$ 389		$ 390		$ 430		$ 383	[1]
Balance (in shares)	43,391	43,388	39,016	38,853		38,841	[1]	43,391	38,853		39,016		43,024		38,345	[1]
Additional Paid-In Capital
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ 144,451	$ 144,282	$ 136,329	$ 136,151	[1]	$ 135,978	[1]	$ 144,282	$ 135,978	[1]	$ 135,978	[1]	$ 135,978	[1]	$ 134,217
Sale of common stock			165								165		7,597
Stock-based compensation	129	169	178	178		173		298	351		529		707		1,163
Stock-based consulting fees															598
Balance	144,580	144,451	136,672	136,329		136,151	[1]	144,580	136,329		136,672		144,282		135,978	[1]
Treasury Stock
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ (57,461)	$ (57,166)	$ (57,166)	$ (57,166)	[1]	$ (56,791)	[1]	$ (57,166)	$ (56,791)	[1]	$ (56,791)	[1]	$ (56,791)	[1]	$ (55,731)
Balance at beginning of period (in shares)	(6,551)	(6,398)	(6,398)	(6,398)	[1]	(6,173)	[1]	(6,398)	(6,173)	[1]	(6,173)	[1]	(6,173)	[1]	(5,731)
Settlement of stock awards		$ (295)				$ (375)		$ (295)	$ (375)		$ (375)		$ (375)		$ (701)
Settlement of stock awards (in shares)	10	(153)				(225)		(143)	(225)		(225)		(225)		(222)
Stock buy-back															$ (359)
Stock buy-back (in shares)															(220)
Balance	$ (57,461)	$ (57,461)	$ (57,166)	$ (57,166)		$ (57,166)	[1]	$ (57,461)	$ (57,166)		$ (57,166)		$ (57,166)		$ (56,791)	[1]
Balance (in shares)	(6,541)	(6,551)	(6,398)	(6,398)		(6,398)	[1]	(6,541)	(6,398)		(6,398)		(6,398)		(6,173)	[1]
Accumulated Deficit
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ (41,327)	$ (36,196)	$ (29,244)	$ (22,810)	[1]	$ (15,391)	[1]	$ (36,196)	$ (15,391)	[1]	$ (15,391)	[1]	$ (15,391)	[1]	$ (19,724)
Net loss attributable to common stockholders	(223)	(5,131)	(3,608)	(6,434)		(7,419)		(5,354)	(13,853)		(17,461)		(20,805)		4,333
Balance	(41,550)	(41,327)	(32,852)	(29,244)		(22,810)	[1]	(41,550)	(29,244)		(32,852)		(36,196)		(15,391)	[1]
Accumulated Other Comprehensive Loss
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	(1,224)	(1,343)	(1,922)	(2,040)	[1]	(2,159)	[1]	(1,343)	(2,159)	[1]	(2,159)	[1]	(2,159)	[1]	(3,174)
Unrealized gain on pension liability	118	119	119	118		119		237	237		356		816		1,015
Balance	(1,106)	(1,224)	(1,803)	(1,922)		(2,040)	[1]	(1,106)	(1,922)		(1,803)		(1,343)		(2,159)	[1]
As Previously Reported
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	57,685	60,226	56,824	61,241		67,908		60,226	67,908		67,908		67,908		59,691
Balance at beginning of period													60,226
Net loss attributable to common stockholders		(2,538)	(1,032)	(4,714)		(6,589)			(11,303)		(12,335)		(16,474)		6,494
Sale of common stock			166								167		7,639
Settlement of stock awards		(291)		1		(370)			(369)		(370)		(370)		(696)
Unrealized gain on pension liability		119	119	118		119			237		356		816		1,015
Stock-based compensation		169	178	178		173			351		529		707		1,163
Stock-based consulting fees															600
Stock buy-back															(359)
Balance		57,685	56,255	56,824		61,241			56,824		56,255		60,226		67,908
As Previously Reported | Common Stock
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ 434	$ 430	$ 389	$ 388		$ 383		$ 430	$ 383		$ 383		$ 383		$ 376
Balance at beginning of period (in shares)	43,388	43,024	38,853	38,841		38,345		43,024	38,345		38,345		38,345		37,612
Sale of common stock			$ 1								$ 2		$ 42
Sale of common stock (in shares)			150								150		4,144
Settlement of stock awards		$ 4		$ 1		$ 5			$ 6		$ 5		$ 5		$ 5
Settlement of stock awards (in shares)		364	13	12		496			508		521		535		543
Stock-based consulting fees															$ 2
Stock-based consulting fees (in shares)															190
Balance		$ 434	$ 390	$ 389		$ 388			$ 389		$ 390		$ 430		$ 383
Balance (in shares)		43,388	39,016	38,853		38,841			38,853		39,016		43,024		38,345
As Previously Reported | Additional Paid-In Capital
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ 144,451	$ 144,282	$ 136,329	$ 136,151		$ 135,978		$ 144,282	$ 135,978		$ 135,978		$ 135,978		$ 134,217
Sale of common stock			165										7,597
Sale of common stock (in shares)											165
Stock-based compensation		169	178	178		173			351		$ 529		707		1,163
Stock-based consulting fees															598
Balance		144,451	136,672	136,329		136,151			136,329		136,672		144,282		135,978
As Previously Reported | Treasury Stock
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ (57,461)	$ (57,166)	$ (57,166)	$ (57,166)		$ (56,791)		$ (57,166)	$ (56,791)		$ (56,791)		$ (56,791)		$ (55,731)
Balance at beginning of period (in shares)	(6,551)	(6,398)	(6,398)	(6,398)		(6,173)		(6,398)	(6,173)		(6,173)		(6,173)		(5,731)
Settlement of stock awards		$ (295)				$ (375)			$ (375)		$ (375)		$ (375)		$ (701)
Settlement of stock awards (in shares)		(153)				(225)			(225)		(225)		(225)		(222)
Stock buy-back															$ (359)
Stock buy-back (in shares)															(220)
Balance		$ (57,461)	$ (57,166)	$ (57,166)		$ (57,166)			$ (57,166)		$ (57,166)		$ (57,166)		$ (56,791)
Balance (in shares)		(6,551)	(6,398)	(6,398)		(6,398)			(6,398)		(6,398)		(6,398)		(6,173)
As Previously Reported | Accumulated Deficit
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ (28,515)	$ (25,977)	$ (20,806)	$ (16,092)		$ (9,503)		$ (25,977)	$ (9,503)		$ (9,503)		$ (9,503)		$ (15,997)
Balance at beginning of period													(25,977)
Net loss attributable to common stockholders		(2,538)	(1,032)	(4,714)		(6,589)			(11,303)		(12,335)		(16,474)		6,494
Balance		(28,515)	(21,838)	(20,806)		(16,092)			(20,806)		(21,838)		(25,977)		(9,503)
As Previously Reported | Accumulated Other Comprehensive Loss
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	(1,224)	(1,343)	(1,922)	(2,040)		(2,159)		(1,343)	(2,159)		(2,159)		(2,159)		(3,174)
Unrealized gain on pension liability		119	119	118		119			237		356		816		1,015
Balance		(1,224)	(1,803)	(1,922)		(2,040)			(1,922)		(1,803)		(1,343)		(2,159)
Error Related to Classification of Real Estate Under Development | Restatement Impact
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	(12,812)	(10,219)	(8,438)	(6,718)		(5,888)		(10,219)	(5,888)		(5,888)		(5,888)		(3,727)
Balance at beginning of period													(10,219)
Net loss attributable to common stockholders		(2,593)	(2,576)	(1,720)		(830)			(2,550)		(5,126)		(4,331)		(2,161)
Balance		(12,812)	(11,014)	(8,438)		(6,718)			(8,438)		(11,014)		(10,219)		(5,888)
Error Related to Classification of Real Estate Under Development | Restatement Impact | Accumulated Deficit
Revision of Previously Issued Consolidated Financial Statements
Balance at beginning of period	$ (12,812)	(10,219)	(8,438)	(6,718)		(5,888)		$ (10,219)	(5,888)		(5,888)		(5,888)		(3,727)
Balance at beginning of period													(10,219)
Net loss attributable to common stockholders		(2,593)	(2,576)	(1,720)		(830)			(2,550)		(5,126)		(4,331)		(2,161)
Balance		$ (12,812)	$ (11,014)	$ (8,438)		$ (6,718)			$ (8,438)		$ (11,014)		$ (10,219)		$ (5,888)

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