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Condensed Statements of Changes in Convertible Preferred Stock and Stockholders' Deficit - USD ($) $ in Thousands | Series A Convertible Preferred Stock. | Common Stock | Additional Paid-in Capital | Retained Earnings | Total
--- | --- | --- | --- | --- | ---
Increase (Decrease) in Temporary Equity |  |  |  |  |
Issuance of convertible Series A preferred stock, net of issuance costs | $ 4,985 |  |  |  |
Issuance of convertible Series A preferred stock (shares) | 745,637 |  |  |  |
Redemption value adjustment - Series A preferred stock | $ 2,666 |  |  |  |
Temporary equity, balance at end of period at Jun. 30, 2015 | $ 7,651 |  |  |  |
Temporary equity, balance at end of period (shares) at Jun. 30, 2015 | 745,637 |  |  |  |
Balance at beginning of period at Dec. 31, 2014 |  | $ 9 | $ 44 | $ (584) | $ (531)
Balance at beginning of period (shares) at Dec. 31, 2014 |  | 3,036,236 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Redemption value adjustment - Series A preferred stock |  |  | (1,036) | (1,630) | (2,666)
Issuance of common stock |  | $ 2 | 906 |  | 908
Issuance of common stock (shares) |  | 675,250 |  |  |
Issuance of restricted stock awards |  | $ 1 | (1) |  |
Issuance of restricted stock awards (in shares) |  | 44,567 |  |  |
Share-based compensation - employee |  |  | 43 |  | 43
Share-based compensation - non-employee |  |  | 44 |  | 44
Net loss |  |  |  | (3,890) | (3,890)
Balance at end of period at Jun. 30, 2015 |  | $ 12 |  | (6,104) | (6,092)
Balance at end of period (shares) at Jun. 30, 2015 |  | 3,756,053 |  |  |
Temporary equity, balance at end of period at Jun. 30, 2015 | $ 7,651 |  |  |  |
Temporary equity, balance at end of period (shares) at Jun. 30, 2015 | 745,637 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net loss |  |  |  |  | (1,611)
Balance at end of period at Jun. 30, 2015 |  | $ 12 |  | (6,104) | (6,092)
Balance at end of period (shares) at Jun. 30, 2015 |  | 3,756,053 |  |  |
Temporary equity, balance at beginning of period at Dec. 31, 2015 | $ 7,953 |  |  |  | 7,953
Temporary equity, balance at beginning of period (shares) at Dec. 31, 2015 | 745,637 |  |  |  |
Increase (Decrease) in Temporary Equity |  |  |  |  |
Redemption value adjustment - Series A preferred stock | $ 299 |  |  |  |
Temporary equity, balance at end of period at Jun. 30, 2016 | $ 8,252 |  |  |  | 8,252
Temporary equity, balance at end of period (shares) at Jun. 30, 2016 | 745,637 |  |  |  |
Balance at beginning of period at Dec. 31, 2015 |  | $ 12 |  | (12,392) | (12,380)
Balance at beginning of period (shares) at Dec. 31, 2015 |  | 3,758,488 |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Redemption value adjustment - Series A preferred stock |  |  | (218) | (81) | (299)
Share-based compensation - employee |  |  | 131 |  | 131
Share-based compensation - non-employee |  |  | $ 87 |  | 87
Net loss |  |  |  | (3,494) | (3,494)
Balance at end of period at Jun. 30, 2016 |  | $ 12 |  | $ (15,967) | $ (15,955)
Balance at end of period (shares) at Jun. 30, 2016 |  | 3,758,488 |  |  |

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