Prepaid Expenses and Other Current Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Due from vendors	$ 95	$ 26
Prepaid maintenance contracts	119	98
Deferred installation costs	30	58
Prepaid insurance	132	94
Prepaid equity issuance costs	100	0
Prepaid software licenses	123	0
Other prepaid expenses	342	128
Deferred financing costs	84	0
Prepaid expenses and other current assets	$ 1,025	$ 404