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CONSOLIDATED CONDENSED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIT) (UNAUDITED) - USD ($) $ in Thousands | Total | Convertible Preferred Stock [Member] | Convertible Preferred Stock [Member] Series B Convertible Preferred Stock [Member] | Convertible Preferred Stock [Member] Series C Convertible Preferred Stock [Member] | Common Stock [Member] | Common Stock [Member] Series B Convertible Preferred Stock [Member] | Common Stock [Member] Series C Convertible Preferred Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Other Comprehensive Income [Member] | Accumulated Deficit [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 13,000 |  |  |  |  |  |  | $ 413,362 | $ 1,387 | $ (401,749)
Balance (in shares) at Dec. 31, 2017 |  | 2,431 |  |  | 115,652 |  |  |  |  |
Share-based compensation | 143 |  |  |  |  |  |  | 143 |  |
Sale of common stock, net | 27 |  |  |  |  |  |  | 27 |  |
Sale of common stock, net (in shares) |  |  |  |  | 202 |  |  |  |  |
Conversion of Convertible Preferred Stock into common stock (share) |  |  | (1,228) |  |  | 7,375 |  |  |  |
Foreign currency translation adjustment and accumulated other comprehensive income | (281) |  |  |  |  |  |  |  | (281) |
Net loss | (4,409) |  |  |  |  |  |  |  |  | (4,409)
Balance at Mar. 31, 2018 | 8,480 |  |  |  |  |  |  | 413,532 | 1,106 | (406,158)
Balance (in shares) at Mar. 31, 2018 |  | 1,203 |  |  | 123,229 |  |  |  |  |
Balance at Dec. 31, 2017 | 13,000 |  |  |  |  |  |  | 413,362 | 1,387 | (401,749)
Balance (in shares) at Dec. 31, 2017 |  | 2,431 |  |  | 115,652 |  |  |  |  |
Net loss | (8,068) |  |  |  |  |  |  |  |  |
Balance at Jun. 30, 2018 | 4,751 |  |  |  |  |  |  | 413,331 | 1,237 | (409,817)
Balance (in shares) at Jun. 30, 2018 |  | 1,186 |  |  | 123,524 |  |  |  |  |
Balance at Mar. 31, 2018 | 8,480 |  |  |  |  |  |  | 413,532 | 1,106 | (406,158)
Balance (in shares) at Mar. 31, 2018 |  | 1,203 |  |  | 123,229 |  |  |  |  |
Share-based compensation | 96 |  |  |  |  |  |  | 96 |  |
Sale of common stock, net | (297) |  |  |  |  |  |  | (297) |  |
Sale of common stock, net (in shares) |  |  |  |  | 192 |  |  |  |  |
Conversion of Convertible Preferred Stock into common stock (share) |  |  | (17) |  |  | 103 |  |  |  |
Foreign currency translation adjustment and accumulated other comprehensive income | 131 |  |  |  |  |  |  |  | 131 |
Net loss | (3,659) |  |  |  |  |  |  |  |  | (3,659)
Balance at Jun. 30, 2018 | 4,751 |  |  |  |  |  |  | 413,331 | 1,237 | (409,817)
Balance (in shares) at Jun. 30, 2018 |  | 1,186 |  |  | 123,524 |  |  |  |  |
Balance at Dec. 31, 2018 | $ 5,225 |  |  |  |  |  |  | 418,390 | 1,218 | (414,383)
Balance (in shares) at Dec. 31, 2018 | 296,609 | 4,606 |  |  | 296,609 |  |  |  |  |
Share-based compensation | $ 49 |  |  |  |  |  |  | 49 |  |
Sale of common stock, net | 1,873 |  |  |  |  |  |  | 1,873 |  |
Sale of common stock, net (in shares) |  |  |  |  | 139,855 |  |  |  |  |
Conversion of Convertible Preferred Stock into common stock (share) |  |  |  | (66) |  |  | 1,653 |  |  |
Foreign currency translation adjustment and accumulated other comprehensive income | (140) |  |  |  |  |  |  |  | (140) |
Net loss | (3,150) |  |  |  |  |  |  |  |  | (3,150)
Balance at Mar. 31, 2019 | 3,857 |  |  |  |  |  |  | 420,312 | 1,078 | (417,533)
Balance (in shares) at Mar. 31, 2019 |  | 4,540 |  |  | 438,117 |  |  |  |  |
Balance at Dec. 31, 2018 | $ 5,225 |  |  |  |  |  |  | 418,390 | 1,218 | (414,383)
Balance (in shares) at Dec. 31, 2018 | 296,609 | 4,606 |  |  | 296,609 |  |  |  |  |
Net loss | $ (12,297) |  |  |  |  |  |  |  |  |
Balance at Jun. 30, 2019 | $ (6,276) |  |  |  |  |  |  | 420,404 |  | (426,680)
Balance (in shares) at Jun. 30, 2019 | 296,609 | 4,540 |  |  | 443,117 |  |  |  |  |
Balance at Mar. 31, 2019 | $ 3,857 |  |  |  |  |  |  | 420,312 | 1,078 | (417,533)
Balance (in shares) at Mar. 31, 2019 |  | 4,540 |  |  | 438,117 |  |  |  |  |
Share-based compensation | 28 |  |  |  |  |  |  | 28 |  |
Sale of common stock, net | 64 |  |  |  |  |  |  | 64 |  |
Sale of common stock, net (in shares) |  |  |  |  | 5,000 |  |  |  |  |
Foreign currency translation adjustment and accumulated other comprehensive income | (1,078) |  |  |  |  |  |  |  | $ (1,078) |
Net loss | (9,147) |  |  |  |  |  |  |  |  | (9,147)
Balance at Jun. 30, 2019 | $ (6,276) |  |  |  |  |  |  | $ 420,404 |  | $ (426,680)
Balance (in shares) at Jun. 30, 2019 | 296,609 | 4,540 |  |  | 443,117 |  |  |  |  |

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