CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current liabilities:
Accounts payable, related parties	$ 0	$ 74
Stockholders' equity:
Preferred stock, par value (in dollars per share)	$ 0.10	$ 0.10
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	6,000	6,505
Preferred stock, shares outstanding (in shares)	6,000	6,505
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	150,000,000	150,000,000
Common stock, shares issued (in shares)	10,834,490	10,283,393
Common stock, shares outstanding (in shares)	10,834,490	10,283,393