Revenue Recognition and Contractual Adjustments - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Contract with Customer, Asset, Net [Abstract]
Current pharma contract asset	$ 821	$ 541
Long-term pharma contract asset	140	31
Total pharma contract asset	961	572
Capitalized Contract Cost [Abstract]
Current pharma capitalized commissions	436	371
Long-term pharma capitalized commissions	213	171
Total pharma capitalized commissions	649	542
Contract with Customer, Liability [Abstract]
Current pharma contract liability	2,193	1,406
Long-term pharma contract liability	522	283
Total pharma contract liability	$ 2,715	$ 1,689