Common Stock (Details)
$ / shares in Units, $ in Thousands |
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12 Months Ended |
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Aug. 15, 2017
shares
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Aug. 14, 2017
shares
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Aug. 01, 2017 |
Dec. 29, 2016
USD ($)
$ / shares
shares
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Dec. 31, 2017
$ / shares
shares
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Dec. 31, 2016
USD ($)
$ / shares
shares
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| Stockholders' Equity Note [Abstract] |
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| Common Stock, Shares Authorized |
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250,000,000
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250,000,000
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| Common stock par value | $ / shares |
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$ 0.0001
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$ 0.0001
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| Number of votes entitled to stock holders of record for each share of common stock held |
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1
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| Total warrants outstanding |
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9,649,318
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9,649,318
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| Number of shares issued |
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7,741,908
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| Shares issued on split-adjusted basis |
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1,935,477
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| Common stock price per share issued | $ / shares |
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$ 0.62
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| Price per share as adjusted for reverse stock split | $ / shares |
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$ 2.48
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| Gross proceeds | $ |
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$ 4,800
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| Transaction expenses | $ |
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400
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| Issuance of common stock, net of issuance costs | $ |
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$ 4,400
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$ 4,370
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| Reverse Stock Split [Abstract] |
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| Stockholders' Equity Note, Stock Split, Conversion Ratio |
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0.25
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| Number of shares combined into one share at reverse stock split |
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4
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| Common stock shares outstanding |
11,156,257
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44,623,949
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11,156,257
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11,156,257
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| Number of fractional shares issued as result of reverse stock split |
0
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