Accrued Compensation and related expenses (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Accrued Compensation and related expenses [Abstract]
Accrued payroll and related taxes	$ 563		$ 1,010
Accrued vacation	335		262
Accrued commissions and bonus	1,598		1,222
Total accrued compensation and related expense	$ 2,496	[1]	$ 2,494

[1] (unaudited)