Debt - Borrowings (Details) - USD ($)
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3 Months Ended |
12 Months Ended |
|
Mar. 31, 2014 |
Jun. 01, 2009 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
Sep. 30, 2014 |
| Debt Instrument [Line Items] |
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| Long-term debt |
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$ 70,000
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| Gains on cancellation of debt |
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$ 0
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0
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$ 892,000
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|
| Conversion of subordinated convertible debt |
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0
|
6,145,000
|
$ 1,500,000
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|
| Debt conversion, converted instrument, number of shares issued |
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|
3,323,913
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|
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| One-time charge in relation to the conversion of the notes |
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2,700,000
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| Interest expense |
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154,000
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|
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| Write off of deferred debt issuance cost |
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293,000
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| Revolving credit facility |
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| Debt Instrument [Line Items] |
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| Credit facility, remaining borrowing capacity |
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2,300,000
|
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| Unsecured convertible notes | Common stock |
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| Debt Instrument [Line Items] |
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| Conversion of subordinated convertible debt |
$ 6,150,000
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| Debt conversion, converted instrument, number of shares issued |
2,671,739
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| Unsecured promissory note - Quercus Trust |
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| Debt Instrument [Line Items] |
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| Unsecured promissory note - Quercus Trust |
|
$ 70,000
|
|
|
$ 70,000
|
|
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| Credit facility, commitment fee percentage |
|
1.00%
|
|
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| Single payment to cancel note and accrued interest |
|
|
|
13,000
|
|
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| Accrued interest |
|
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|
5,000
|
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| Unsecured promissory note - Quercus Trust | Other income |
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| Debt Instrument [Line Items] |
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| Gains on cancellation of debt |
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$ 62,000
|
|
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| Convertible debt |
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| Debt Instrument [Line Items] |
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| Debt conversion, converted instrument, additional interest rate |
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5.00%
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