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1. Nature of Activities and Summary of Significant Accounting Policies (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Accounting Policies [Abstract]        
Net income (loss) $ (5,755) $ 464 $ (20,685) $ 10,873
Shares:        
Weighted average shares outstanding-basic 19,521 20,555 19,898 20,284
Weighted average dilutive share equivalents from preferred shares 0 217 0 231
Weighted average dilutive share equivalents from stock options 0 460 0 242
Weighted average dilutive share equivalents from common warrants 0 244 0 189
Weighted average shares outstanding-diluted 19,521 21,476 19,898 20,946
Earnings (loss) per share-basic $ (0.29) $ 0.02 $ (1.04) $ 0.54
Earnings (loss) per share-diluted $ (0.29) $ 0.02 $ (1.04) $ 0.52