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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Cash flows from operating activities:    
Net loss $ (4,718) $ (1,851)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:    
Depreciation and amortization expense 273 449
Amortization of right-of-use assets 186 217
Share-based compensation expense 52 47
Change of inventory to net realizable value 98 103
Gain on disposal of assets and sale of marketable securities (71) 0
Changes in operating assets and liabilities:    
Receivables 4,705 (629)
Legal settlement receivable 0 55,000
Inventories (2,701) 657
Prepaid expenses and other assets 206 3,536
Accounts payable (43) 1,151
Accrued liabilities (511) (204)
Income taxes receivable 9 (5,310)
Deferred product revenue (7) (11)
Operating lease liabilities (200) (235)
Net cash provided by operating activities (2,722) 52,920
Cash flows from investing activities:    
Purchase of property and equipment (135) (326)
Purchase of intangibles (53) (79)
Proceeds from maturities and sales of marketable securities 5,372 2,344
Purchases of marketable securities (3,358) (9,332)
Net cash provided by (used in) investing activities 1,826 (7,393)
Cash flows from financing activities:    
Dividend payment (14,490) (28,979)
Net proceeds from equity-based compensation programs 7 1
Principal payments of debt 0 (2,450)
Net cash provided by (used in) financing activities (14,483) (31,428)
Effect of exchange rate changes on cash and cash equivalents (6) 3
Net increase in cash and cash equivalents (15,385) 14,102
Cash and cash equivalents at the beginning of the period 17,835 984
Cash and cash equivalents at the end of the period 2,450 15,086
The following is a summary of supplemental cash flow activities:    
Cash (refund)/paid for income taxes 0 6,631
Cash paid for interest $ 0 $ 273