Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Detail)

Commitments and Contingencies (Detail) $ in Thousands		1 Months Ended		2 Months Ended	3 Months Ended		5 Months Ended	6 Months Ended	12 Months Ended	24 Months Ended
Commitments and Contingencies (Detail) $ in Thousands	Feb. 01, 2016 USD ($)	Nov. 30, 2015 claim	Sep. 30, 2015 USD ($)	Jan. 31, 2015 USD ($) plaintiff claim	Jul. 31, 2016 USD ($) claim	Jun. 30, 2016 USD ($) claim	Jun. 30, 2016 USD ($) plaintiff claim	Jun. 30, 2016 USD ($) claim	Feb. 29, 2016 plaintiff claim	Dec. 31, 2014 USD ($) security_offering firm underwriter
Loss Contingencies [Line Items]
Number of firms that underwrote security offerings \| firm										9
Number of security offerings \| security_offering										6
Loss contingency accrual, product liability						$ 437	$ 437	$ 437
Charges to operations						662		1,339
Term of contract	14 years
2016	$ 1,791
2017						1,791	1,791	1,791
2018	$ 1,954
Increase per year thereafter, percent	2.00%
Aggregate Commitment						$ 51,199	$ 51,199	$ 51,199
Ladenburg
Loss Contingencies [Line Items]
Number of security offerings \| security_offering										2
Number of underwriters \| underwriter										1
Ladenburg \| Subsequent Event
Loss Contingencies [Line Items]
New claims filed, number \| claim					4
Damages sought by plaintiff					$ 4,300
Subsidiaries
Loss Contingencies [Line Items]
Term of contract	12 years
Annual rental payments	$ 1,811
Compensatory damages
Loss Contingencies [Line Items]
New claims filed, number \| claim		2		2
Number of plaintiffs \| plaintiff				17
Damages sought by plaintiff										$ 151,000
Compensatory damages \| Ladenburg
Loss Contingencies [Line Items]
Damages sought by plaintiff										$ 2,900,000
Compensatory damages \| Triad
Loss Contingencies [Line Items]
New claims filed, number \| claim									8
Number of plaintiffs \| plaintiff							3		45
Damages sought by plaintiff							$ 466
New lawsuits filed, number \| claim									1
Number of claims settled \| claim							7
Number of claims pending decision \| claim						2	2	2
Convertible Notes Payable
Loss Contingencies [Line Items]
Proceeds from issuance Public Offering				$ 300,000
Common Stock
Loss Contingencies [Line Items]
Proceeds from issuance Public Offering				$ 1,656,000
Pending Litigation [Member] \| Compensatory damages \| Triad
Loss Contingencies [Line Items]
Damages sought by plaintiff			$ 3,714