Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Accumulated depreciation	$ 268	$ 357
Accumulated amortization on license agreements	$ 1,406	$ 1,309
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	15,000,000	15,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	70,000,000	100,000,000
Common stock, shares issued	5,586,000	1,746,000
Common stock, shares outstanding	5,586,000	1,746,000