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Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($)
$ in Thousands
Common Stock Including Additional Paid in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2018 35,900,000      
Balance at Dec. 31, 2018 $ 279,353 $ (255) $ (237,700) $ 41,398
Net loss (5,864) (5,864)
Foreign currency translation adjustment 138 138
Issuance of common stock under stock option plan (in shares) 190,000      
Issuance of common stock under stock option plan $ 643 643
Share-based compensation expense 570 570
Stock subscription receivable (102) (102)
Collection of stock subscription receivable $ 200 200
Balance (in shares) at Mar. 31, 2019 36,090,000      
Balance at Mar. 31, 2019 $ 280,664 (117) (243,564) 36,983
Balance (in shares) at Dec. 31, 2019 41,519      
Balance at Dec. 31, 2019 $ 324,808 (106) 430,929 755,631
Net loss (14) (14)
Tender offer buyback (in shares) (14,000)      
Tender offer buyback $ (93,240) (326,760) (420,000)
Foreign currency translation adjustment 90 90
Issuance of common stock under stock option plan (in shares) 1,334      
Issuance of common stock under stock option plan $ 7,918 7,918
Share-based compensation expense $ 3,456 3,456
Balance (in shares) at Mar. 31, 2020 28,853      
Balance at Mar. 31, 2020 $ 242,942 $ (16) $ 104,155 $ 347,082