CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues:
Total revenues		$ 8,893	$ 16,806	$ 21,239	$ 28,437
Cost of revenues:
Total cost of revenues		6,290	14,385	14,370	24,529
Gross profit		2,603	2,421	6,869	3,908
Operating expenses:
Selling, general and administrative		4,209	3,195	7,893	6,885
Amortization of intangible assets		430	430	860	860
Total operating expenses		4,639	3,625	8,753	7,745
Income (loss) from continuing operations		(2,036)	(1,204)	(1,884)	(3,837)
Other income (expense):
Other income (expense), net		568	(442)	459	(444)
Interest income (expense), net		163	(154)	136	(280)
Total other income (expense), net		731	(596)	595	(724)
Income (loss) before income taxes from continuing operations		(1,305)	(1,800)	(1,289)	(4,561)
Income tax benefit (provision) from continuing operations		(61)	510	(61)	(1,160)
Income (loss) from continuing operations, net of tax		(1,366)	(1,290)	(1,350)	(5,721)
Income (loss) from discontinued operations, net of tax (Note 10)		26,957	(286)	27,376	444
Net income (loss)		25,591	(1,576)	26,026	(5,277)
Deemed dividend on Series A perpetual preferred stock		(479)	(479)	(958)	(958)
Net income (loss) attributable to common shareholders		25,112	(2,055)	25,068	(6,235)
Net income (loss) attributable to common shareholders		$ 25,112	$ (2,055)	$ 25,068	$ (6,235)
Net income (loss) per share
Net income (loss) per share, continuing operations, basic (in usd per share)	[1]	$ (0.09)	$ (0.08)	$ (0.09)	$ (0.41)
Net income (loss) per share, continuing operations, diluted (in usd per share)		(0.09)	(0.08)	(0.09)	(0.41)
Net income (loss) per share, discontinuing operations, basic (in usd per share)	[1]	1.74	(0.02)	1.76	0.03
Net income (loss) per share, discontinuing operations, diluted (in usd per share)		1.71	(0.02)	1.74	0.03
Net income (loss) per share - basic (in usd per share)	[1]	1.65	(0.10)	1.68	(0.38)
Net income (loss) per share - diluted (in usd per share)	[1]	1.63	(0.10)	1.66	(0.37)
Net income (loss) per share, attributable to common shareholders— basic (in usd per share)	[1]	1.62	(0.13)	1.62	(0.44)
Net income (loss) per share, attributable to common shareholders— diluted (in usd per share)	[1]	$ 1.59	$ (0.13)	$ 1.60	$ (0.44)
Weighted-average common shares outstanding— basic (in shares)	[1]	15,520	15,379	15,518	14,031
Weighted-average common shares outstanding— diluted (in shares)	[1]	15,746	15,436	15,706	14,100
Dividends declared per share of Series A perpetual preferred stock (in usd per share)		$ 0.25	$ 0.25	$ 0.25	$ 0.50
Construction
Revenues:
Total revenues		$ 8,893	$ 16,806	$ 21,239	$ 28,437
Cost of revenues:
Total cost of revenues		6,229	14,321	14,246	24,366
Investments
Cost of revenues:
Total cost of revenues		$ 61	$ 64	$ 124	$ 163

[1] Earnings per share may not add due to rounding