UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash flows from operating activities:
Net loss	$ (1,898)	$ (832)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization expense	167	221
Amortization of right-of-use assets	92	129
Share-based compensation expense	26	23
Change of inventory to net realizable value	193	23
Gain on disposal of assets and sale of marketable securities	(47)	(8)
Changes in operating assets and liabilities:
Receivables	4,485	62
Legal settlement receivable	0	55,000
Inventories	(2,020)	365
Prepaid expenses and other assets	61	4,176
Accounts payable	(211)	536
Accrued liabilities	(321)	(551)
Income taxes receivable	9	1,293
Deferred product revenue	(4)	8
Operating lease liabilities	(99)	(124)
Net cash provided by operating activities	433	60,321
Cash flows from investing activities:
Purchase of property and equipment	(69)	(27)
Purchase of intangibles	(36)	(42)
Proceeds from maturities and sales of marketable securities	2,325	0
Purchases of marketable securities	(1,947)	0
Net cash provided by (used in) investing activities	273	(69)
Cash flows from financing activities:
Net proceeds from equity-based compensation programs	7	0
Principal payments of debt	0	(2,225)
Net cash provided by (used in) financing activities	7	(2,225)
Effect of exchange rate changes on cash and cash equivalents	(4)	4
Net increase in cash and cash equivalents	709	58,031
Cash and cash equivalents at the beginning of the period	17,835	986
Cash and cash equivalents at the end of the period	18,544	59,017
The following is a summary of supplemental cash flow activities:
Cash paid for income taxes	(12)	18
Cash paid for interest	0	231
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Dividends payable	$ 14,496	$ 0