Other Current Assets - Schedule of Other Current Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Reagents	$ 493	$ 322
Prepaid expenses	463	375
Marketable securities interest receivable	223	209
Payroll tax refund	23
Total	$ 1,202	$ 906