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CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
$ in Thousands
Previously Reported
Common Stock [Member]
Previously Reported
Accumulated Deficit [Member]
Previously Reported
Accumulated Other Comprehensive Income/(Loss) [Member]
Previously Reported
Common Stock [Member]
Accumulated Deficit [Member]
Accumulated Other Comprehensive Income/(Loss) [Member]
Total
Cumulative adjustment related to Accounting Standard Update 2016-01 | Accounting Standards Update 2016-01           $ (2) $ 2  
Balances, beginning of period at Dec. 31, 2017 $ 456,053 $ (426,968) $ (2) $ 29,083 $ 456,053 (426,970)   $ 29,083
Balances, beginning of period (in shares) at Dec. 31, 2017 99,412,007       99,412,007      
Shares issued (RSUs vested, net of shares withheld) (Note 6)         $ (39)     (39)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares)         127,942      
Shares issued (exercise of stock options) (Note 6)         $ 16     16
Shares issued (exercise of stock options) (Note 6) (in shares)         30,000      
Stock-based compensation (Note 6)         $ 584     584
Net loss           (2,871)   (2,871)
Balances, end of period at Jun. 30, 2018         $ 456,614 (429,841)   26,773
Balances, end of period (in shares) at Jun. 30, 2018         99,569,949      
Balances, beginning of period at Dec. 31, 2017 $ 456,053 $ (426,968) $ (2) $ 29,083 $ 456,053 (426,970)   $ 29,083
Balances, beginning of period (in shares) at Dec. 31, 2017 99,412,007       99,412,007      
Shares issued (exercise of stock options) (Note 6) (in shares)               218,600
Balances, end of period at Dec. 31, 2018         $ 456,938 (435,684)   $ 21,254
Balances, end of period (in shares) at Dec. 31, 2018         100,268,161      
Balances, beginning of period at Mar. 31, 2018         $ 456,352 (427,918)   28,434
Balances, beginning of period (in shares) at Mar. 31, 2018         99,539,949      
Shares issued (exercise of stock options) (Note 6)         $ 16     16
Shares issued (exercise of stock options) (Note 6) (in shares)         30,000      
Stock-based compensation (Note 6)         $ 246     246
Net loss           (1,923)   (1,923)
Balances, end of period at Jun. 30, 2018         $ 456,614 (429,841)   26,773
Balances, end of period (in shares) at Jun. 30, 2018         99,569,949      
Balances, beginning of period at Dec. 31, 2018         $ 456,938 (435,684)   21,254
Balances, beginning of period (in shares) at Dec. 31, 2018         100,268,161      
Shares issued (RSUs vested, net of shares withheld) (Note 6)         $ (46)     (46)
Shares issued (RSUs vested, net of shares withheld) (Note 6) (in shares)         142,380      
Shares issued (exercise of stock options) (Note 6)         $ 66     $ 66
Shares issued (exercise of stock options) (Note 6) (in shares)         127,000     127,000
Stock-based compensation (Note 6)         $ 467     $ 467
Net loss           (5,696)   (5,696)
Balances, end of period at Jun. 30, 2019         $ 457,425 (441,380)   16,045
Balances, end of period (in shares) at Jun. 30, 2019         100,537,541      
Balances, beginning of period at Mar. 31, 2019         $ 457,009 (438,336)   18,673
Balances, beginning of period (in shares) at Mar. 31, 2019         100,537,541      
Stock-based compensation (Note 6)         $ 416     416
Net loss           (3,044)   (3,044)
Balances, end of period at Jun. 30, 2019         $ 457,425 $ (441,380)   $ 16,045
Balances, end of period (in shares) at Jun. 30, 2019         100,537,541