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Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock | Additional Paid-in Capital | Accumulated Deficit
--- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2011 | $ 19,039 | $ 238 | $ 42,869 | $ (24,068)
Beginning balance (in shares) at Dec. 31, 2011 |  | 23,783,106 |  |
Issuance of common stock in connection with asset purchase (in shares) |  | 160,305 |  |
Issuance of common stock in connection with asset purchase | 600 | 1 | 599 | 0
Issuance of common stock upon exercise of stock options and warrants (in shares) |  | 161,214 |  |
Issuance of common stock upon exercise of stock options and warrants | 122 | 2 | 120 | 0
Issuance of common stock for services (in shares) |  | 20,000 |  |
Issuance of common stock for services | 74 | 0 | 74 | 0
Value of share-based arrangements (in shares) |  | 0 |  |
Value of share-based arrangements | 60 | 0 | 60 | 0
Net Income (Loss) | 12,801 | 0 | 0 | 12,801
Ending balance at Dec. 31, 2012 | 32,696 | 241 | 43,722 | (11,267)
Ending balance (in shares) at Dec. 31, 2012 |  | 24,124,625 |  |
Issuance of common stock upon exercise of stock options (in shares) |  | 945,761 |  |
Issuance of common stock upon exercise of stock options | 1,110 | 10 | 1,100 | 0
Value of share-based arrangements (in shares) |  | 0 |  |
Value of share-based arrangements | 122 | 0 | 122 | 0
Net Income (Loss) | (5,842) | 0 | 0 | (5,842)
Ending balance at Dec. 31, 2013 | $ 28,086 | $ 251 | $ 44,944 | $ (17,109)
Ending balance (in shares) at Dec. 31, 2013 |  | 25,070,386 |  |

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