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Shareholders' Equity - Shareholders' Equity (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period     $ 44,685  
Foreign currency translation adjustment $ (1) $ (1) (3) $ 4
Net loss (2,820) (1,019) (4,718) (1,851)
Balance, end of period 25,552 43,366 25,552 43,366
Common stock and additional paid-in capital [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period 31,608 74,957 46,071 74,934
Dividends declared 0 (28,979) (14,496) (28,979)
Share-based compensation expense 39 25 65 47
Proceeds from employee stock purchase plan (7) 0 0 1
Balance, end of period 31,640 46,003 31,640 46,003
Accumulated other comprehensive loss [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (290) (283) (310) (288)
Unrealized loss on available-for-sale securities, net of tax (3) 14 19 14
Foreign currency translation adjustment (1) (1) (3) 4
Balance, end of period (294) (270) (294) (270)
Accumulated deficit [Member]        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Balance, beginning of period (2,972) (1,348) (1,076) (516)
Net loss (2,822) (1,019) (4,718) (1,851)
Balance, end of period $ (5,794) $ (2,367) $ (5,794) $ (2,367)