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Shareholders' Equity - Shareholders' Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period     $ 44,685  
Foreign currency translation adjustment $ (12) $ (7) (15) $ (3)
Net loss (2,062) (1,351) (6,780) (3,202)
Balance, end of period 23,501 42,013 23,501 42,013
Common stock and additional paid-in capital [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period 31,640 46,003 46,071 74,934
Dividends declared 0 0 (14,496) (28,979)
Share-based compensation expense 21 33 73 80
Proceeds from employee stock purchase plan 3 3 16 4
Balance, end of period 31,664 46,039 31,664 46,039
Accumulated other comprehensive loss [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (294) (270) (310) (288)
Unrealized loss on available-for-sale securities, net of tax 1 (31) 18 (17)
Foreign currency translation adjustment 12 (7) 15 (3)
Balance, end of period (307) (308) (307) (308)
Accumulated deficit [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (5,794) (2,367) (1,076) (516)
Net loss (2,062) (1,351) (6,780) (3,202)
Balance, end of period $ (7,856) $ (3,718) $ (7,856) $ (3,718)