UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (1,019)	$ (257)	$ (1,851)	$ (2,224)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization expense			449	1,593
Amortization of right-of-use assets			217	300
Share-based compensation expense			47	65
Change of inventory to net realizable value	80	27	103	27
Gain recognized on Paycheck Protection Plan Loan forgiveness			0	(1,528)
Changes in operating assets and liabilities:
Receivables			(629)	879
Legal settlement receivable			55,000	0
Inventories			657	730
Prepaid expenses and other assets			3,536	1,097
Accounts payable			1,151	(3,341)
Accrued liabilities			(204)	33
Income taxes receivable			(5,310)	0
Deferred product revenue			(11)	(11)
Operating lease liabilities			(235)	(312)
Net cash provided by (used in) operating activities			52,920	(2,692)
Cash flows from investing activities:
Purchase of property and equipment			(326)	(16)
Purchase of intangibles			(79)	(58)
Capitalized patent defense costs			0	(497)
Proceeds from maturities and sales of marketable securities			2,344	3,008
Purchases of marketable securities			(9,332)	0
Net cash provided by (used in) investing activities			(7,393)	2,437
Cash flows from financing activities:
Dividend payment			(28,979)		$ 0
Net proceeds from equity-based compensation programs			1	2
Paycheck Protection Program loan refund upon full forgiveness net of loan payments			0	768
Principal payments of debt			(2,450)	(360)
Net cash provided by (used in) financing activities			(31,428)	410
Effect of exchange rate changes on cash and cash equivalents			3	(23)
Net increase in cash and cash equivalents			14,102	132
Cash and cash equivalents at the beginning of the period			984	1,071	1,071
Cash and cash equivalents at the end of the period	$ 15,086	$ 1,203	15,086	1,203	$ 984
Supplemental cash flow activities:
Cash paid for income taxes			6,631	39
Cash paid for interest			$ 273	$ 97