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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net loss $ (6,780) $ (3,202)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization expense 377 709
Amortization of right-of-use assets 272 306
Share-based compensation expense 73 80
Change of inventory to net realizable value (92) 105
Gain on sale of marketable securities (102) (12)
Changes in operating assets and liabilities:    
Receivables 5,412 (271)
Legal settlement receivable 0 55,000
Inventories (2,647) 29
Prepaid expenses and other assets 40 4,035
Accounts payable (693) 475
Accrued liabilities (143) (448)
Income taxes receivable 9 (5,310)
Deferred product revenue (8) (25)
Operating lease liabilities (293) (328)
Net cash provided by (used in) operating activities (4,575) 51,143
Cash flows from investing activities:    
Purchase of property and equipment (155) (372)
Purchase of intangibles (88) (111)
Proceeds from maturities and sales of marketable securities 7,852 3,094
Purchases of marketable securities (4,695) (9,389)
Net cash provided by (used in) investing activities 2,914 (6,778)
Cash flows from financing activities:    
Dividend payment (14,496) (28,979)
Net proceeds from equity-based compensation programs 16 4
Principal payments of debt 0 (2,675)
Net cash provided by (used in) financing activities (14,480) (31,650)
Effect of exchange rate changes on cash and cash equivalents (9) (5)
Net increase (decrease) in cash and cash equivalents (16,150) 12,710
Cash and cash equivalents at the beginning of the period 17,835 984
Cash and cash equivalents at the end of the period 1,685 13,694
The following is a summary of supplemental cash flow activities:    
Cash paid for income taxes 29 6,650
Cash paid for interest $ 0 $ 311