Note 11 - Convertible Preferred Stock, Net - Summary of Convertible Preferred Stock Activity (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Beneficial conversion feature | $ 1,521 | ||
| Contingent Convertible Preferred Stock [Member] | |||
| Beginning balance | $ 77,576 | ||
| Beginning balance, shares (in shares) | 803,518 | ||
| Shares issued | $ 81,250 | ||
| Temporary Equity, Shares Issued | 805,000 | ||
| Issuance costs | $ (3,531) | ||
| Beneficial conversion feature | (1,071) | ||
| Amortization of beneficial conversion feature | 1,071 | ||
| Conversion to common stock | $ (12) | $ (149) | |
| Conversion to common stock (in shares) | (120) | (1,482) | |
| Allocation of issuance costs | $ 1 | $ 6 | |
| Ending balance | $ 77,565 | $ 77,576 | |
| Ending balance, shares (in shares) | 803,398 | 803,518 | |
| Allocation of issuance costs | $ 1 | $ 6 | |