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CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Total | Preferred Stock | Common Stock | Additional Paid-In Capital | Accumulated Deficit
--- | --- | --- | --- | --- | ---
Beginning balance, amount at Dec. 31, 2015 | $ 23,404 | $ 2 | $ 27 | $ 42,859 | $ (19,484)
Beginning balance (in shares) at Dec. 31, 2015 |  | 1,976 | 27,051 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock based compensation | 360 |  |  | 360 |
Net loss | (2,463) |  |  |  | (2,463)
Ending balance, amount at Jun. 30, 2016 | 21,301 | $ 2 | $ 27 | 43,219 | (21,947)
Ending balance (in shares) at Jun. 30, 2016 |  | 1,976 | 27,051 |  |
Beginning balance, amount at Dec. 31, 2016 | 26,223 | $ 1 | $ 31 | 49,625 | (23,434)
Beginning balance (in shares) at Dec. 31, 2016 |  | 976 | 30,860 |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock based compensation | 341 |  |  | 341 |
Net loss | (2,993) |  |  |  | (2,993)
Ending balance, amount at Jun. 30, 2017 | $ 23,571 | $ 1 | $ 31 | $ 49,966 | $ (26,427)
Ending balance (in shares) at Jun. 30, 2017 |  | 976 | 30,860 |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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