CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts receivable, allowance	$ 200	$ 200
Accumulated depreciation and amortization	$ 8,793	$ 7,512
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000	10,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	2,000,000	2,000,000
Common stock, shares issued	46,165	43,333
Treasury stock, shares at cost	5,118	5,118