Consolidated Statements of Operations and Other Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenues, net	$ 44,384	$ 122,647
Cost of revenues	28,145	51,993
Gross profit	16,239	70,654
Operating expenses:
Diagnostic expenses	1,932	12,022
General and administration	34,502	34,385
Research and development	1,418	652
Total operating expenses	37,852	47,059
(Loss) income from operations	(21,613)	23,595
Interest income, net	78	153
Interest expense	(1,275)	(764)
Change in fair value of investment securities	0	(76)
Other income	10	0
(Loss) income from operations before income taxes	(22,800)	22,908
Income tax benefit (expense)	6,018	(4,445)
Loss (income) from operations after income taxes	(16,782)	18,463
Other comprehensive (loss) income:
Unrealized gain on marketable debt securities, net of taxes	(1,057)	932
Total comprehensive (loss) income	$ (17,839)	$ 19,395
Earnings (loss) per share:
Basic (in dollars per share)	$ (0.98)	$ 1.17
Diluted (in dollars per share)	$ (0.98)	$ 1.02
Weighted average common shares outstanding:
Basic (in shares)	17,207	15,845
Diluted (in shares)	17,207	18,651