Statements of Cash Flows - Summary of Supplemental Cash Flows Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Supplemental Cash Flow Information
Cash paid for interest	$ 123	$ 181	$ 246
Cash paid for income taxes	634	235	258
Supplemental Non-Cash Information
Construction Costs Funded by Landlord	741	0	0
Common stock issued in connection with StreamOnce acquisition			852
StreamOnce, Inc. [Member]
Supplemental Non-Cash Information
Common stock issued in connection with StreamOnce acquisition	$ 0	$ 0	$ 852