CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (1,568)	$ (1,279)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	149	225
Stock-based compensation	335	430
Interest on note receivable	(31)	(7)
Non-cash lease expense	173
Changes in assets and liabilities:
Accounts receivable	417	(368)
Unbilled receivables	(325)	(88)
Prepaid expenses and other current assets	(181)	(394)
Accounts payable	(15)	190
Accrued expenses	(502)	(650)
Deferred revenue	63	(440)
Net cash used in operating activities	(1,485)	(2,381)
Cash flows from investing activities:
Purchases of property and equipment	(16)
Purchase of marketable securities	(2,752)
Sale of marketable securities	1,250
Investment in note receivable		(2,500)
Net cash used in investing activities	(1,518)	(2,500)
Cash flows from financing activities:
Payments made for taxes of employees who surrendered shares related to unrestricted stock	(15)
Repurchase of common stock	(341)
Net cash used in financing activities	(356)
Decrease in cash and cash equivalents	(3,359)	(4,881)
Cash and cash equivalents, beginning of period	11,749	29,963
Cash and cash equivalents, end of period	$ 8,390	$ 25,082