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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (USD $)
In Thousands, unless otherwise specified
Common Stock [Member]
Stock-based compensation [Member]
Warrants [Member]
Additional paid in capital [Member]
Deficit [Member]
Accumulated other comprehensive income (loss) [Member]
Total
Balances at Dec. 31, 2008 $ 300,657 $ 4,161 $ 336 $ 6,772 $ (289,315) $ 5,413 $ 28,024
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity financing, net of transaction costs 20,369 0 0 0 0 0 20,369
Stock options exercised 287 (42) 0 0 0 0 245
Stock options expensed 0 888 0 0 0 0 888
Stock options expired 0 (90) 0 90 0 0 0
Other comprehensive loss 0 0 0 0 0 (4,737) (4,737)
Net income 0 0 0 0 (5,952) 0 (5,952)
Balances at Dec. 31, 2009 321,313 4,917 336 6,862 (295,267) 676 38,837
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity financing, net of transaction costs 22,680 0 9,329 0 0 0 32,009
Stock options exercised 80 (27) 0 0 0 0 53
Stock options expensed 0 382 0 0 0 0 382
Stock options expired 0 (703) 0 703 0 0 0
Restricted stock units expensed 0 126 0 0 0 0 126
Convertible debt repurchase 5,646 0 0 0 0 0 5,646
Warrants issued 0 0 1,056 0 0 0 1,056
Warrants exercised   0 0 0 0 0 0
Other comprehensive loss 0 0 0 0 0 253 253
Net income 0 0 0 0 (20,020) 0 (20,020)
Balances at Dec. 31, 2010 349,719 4,695 10,721 7,565 (315,287) 929 58,342
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Equity financing, net of transaction costs 28,396   588 0 0 0 28,984
Stock options exercised 1,313 (430) 0 0 0 0 883
Stock options expensed 0 1,496 0 0 0 0 1,496
Stock options expired 0 (828) 0 828 0 0 0
Restricted stock units exercised 392 (392) 0 0 0 0 0
Restricted stock units expensed 0 524 0 0 0 0 524
Cash paid in lieu of capital stock issuances (107) 0 0 0 0 0 (107)
Warrants expired 0 0 (336) 336 0 0 0
Warrants exercised 406 0 (97) 0 0 0 309
Other comprehensive loss 0 0 0 0 0 (754) (754)
Net income 0 0 0 0 51,546 0 51,546
Balances at Dec. 31, 2011 $ 380,119 $ 5,065 $ 10,876 $ 8,729 $ (263,741) $ 175 $ 141,223