Condensed Consolidated Balance Sheets (Parenthetical) $ in Thousands	Sep. 30, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares
Statement Of Financial Position [Abstract]
Accounts receivable, related party amount, current | $	$ 1,133	$ 752
Prepaid expenses and other current assets, related party amount | $	583	0
Accrued expenses related party amount, current | $	0	537
Deferred revenue related party amount | $	$ 171	$ 527
Common stock, shares authorized	40,890,954	40,253,674
Common stock, shares issued	40,826,727	40,164,307
Common stock, shares outstanding	40,381,854	39,719,434
Common stock, conditional capital	16,746,246	15,325,607
Treasury stock, shares	444,873	444,873