Commitments and Contingencies - Additional Information (Detail)					3 Months Ended		12 Months Ended
	Mar. 01, 2016 ft²	Sep. 08, 2015 USD ($)	Jul. 01, 2015 USD ($) ft²	Feb. 02, 2015 USD ($)	Mar. 31, 2017 USD ($) ft²	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Mar. 07, 2017 USD ($)
Loss Contingencies [Line Items]
Non-cancelable operating lease agreement term			4 years
Area of real estate property (in sqft) | ft²			8,171
Future minimum commitment under non-cancelable operating lease			$ 23,300	$ 22,000
Term of increases to monthly payments			3 years	2 years
Additional area of office space for headquarters facility | ft²	5,265
Rent expense					$ 135,000	$ 184,000
Contingent consideration liability								$ 1,100,000
Long-term contingent consideration liability								1,100,000
Ivyland, Pennsylvania [Member]
Loss Contingencies [Line Items]
Area of real estate property (in sqft) | ft²					2,100
NeoForce Group, Inc. [Member] | NeoForce, Inc [Member]
Loss Contingencies [Line Items]
Royalty payment period					36 months
Fair value of royalty		$ 153,000			$ 165,000		$ 153,000
Noncurrent fair value of royalty					$ 60,000
Earnout Payments [Member] | Essentialis, Inc. [Member]
Loss Contingencies [Line Items]
Contingent consideration								$ 30,000,000