Revenue Recognition and Contractual Adjustments - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Contract with Customer, Asset, Net [Abstract]
Current pharma contract asset	$ 400	$ 541
Long-term pharma contract asset	29	31
Total pharma contract asset	429	572
Capitalized Contract Cost [Abstract]
Current pharma capitalized commissions	264	371
Long-term pharma capitalized commissions	574	171
Total pharma capitalized commissions	838	542
Contract with Customer, Liability [Abstract]
Current pharma contract liability	2,155	1,406
Long-term pharma contract liability	648	283
Total pharma contract liability	$ 2,803	$ 1,689