Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance for doubtful accounts	$ 1,080	$ 1,050
Property and equipment, accumulated depreciation	3,634	3,077
Intangible assets, accumulated amortization	12,753	10,315
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	102,333,333	52,333,333
Common stock, shares outstanding	7,791,053	7,722,262
Pro Forma
Accounts receivable, allowance for doubtful accounts	1,080
Property and equipment, accumulated depreciation	3,634
Intangible assets, accumulated amortization	$ 12,753
Common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	50,000,000
Common stock, shares issued	6,738,589	6,674,905
Common stock, shares outstanding	6,738,589	6,674,905
Common stock | Pro Forma
Common stock, par value (in dollars per share)	$ 0.0001
Common stock, shares authorized	250,000,000
Common stock, shares issued	49,463,369
Common stock, shares outstanding	49,463,369
Series II common stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	2,333,333	2,333,333
Common stock, shares issued	1,052,464	1,047,357
Common stock, shares outstanding	1,052,464	1,047,357
Series II common stock | Pro Forma
Common stock, shares authorized	0
Common stock, shares issued	0
Common stock, shares outstanding	0