Restricted Stock (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Restricted Stock [Member]	Mar. 31, 2013 Restricted Stock [Member]	Mar. 31, 2014 Cost of revenue [Member] Restricted Stock [Member]	Mar. 31, 2013 Cost of revenue [Member] Restricted Stock [Member]	Mar. 31, 2014 Research and development [Member] Restricted Stock [Member]	Mar. 31, 2013 Research and development [Member] Restricted Stock [Member]	Mar. 31, 2014 Sales and marketing [Member] Restricted Stock [Member]	Mar. 31, 2013 Sales and marketing [Member] Restricted Stock [Member]	Mar. 31, 2014 General and administrative [Member] Restricted Stock [Member]	Mar. 31, 2013 General and administrative [Member] Restricted Stock [Member]	Mar. 31, 2014 Shares Withheld and Repurchased [Member] Restricted Stock [Member]	Mar. 31, 2014 Additional Paid-in Capital [Member]	Mar. 31, 2014 Additional Paid-in Capital [Member] Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vested, restricted shares			(36)										(18)
Minimum statutory tax withholding requirements													$ 30
Issuance of restricted stock to settle accrued 2013 bonuses, Value	204													204	204
Accrued bonuses		165
Restricted stock compensation expense			92	398	16	5	3	3	2	15	71	375
Unrecognized stock-based compensation expense for restricted stock			811
Unrecognized stock-based compensation expense, restricted stock, upon change in control, value			113
Unrecognized stock-based compensation expense, restricted stock, upon change in control, shares			45
Unrecognized stock-based compensation expense, restricted stock, amortized for weighted average period			$ 698
Weighted average period for amortization of unrecognized stock-based compensation, restricted stock			3 years 10 months 28 days