CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Stockholders’ equity:
Preferred stock Series A-2, convertible, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock Series A-2, stated value	$ 7,500	$ 7,500
Preferred stock Series A-2, shares authorized	7,500	7,500
Preferred stock Series A-2, shares issued	32	32
Preferred stock Series A-2, shares outstanding	32	32
Preferred stock Series A-2, liquidation value	$ 237,000	$ 237,000
Common stock, convertible, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	36,059,000	35,899,000
Common stock, shares outstanding	35,855,000	35,710,000
Treasury stock, shares	204,000	179,000