Summary of Significant Accounting Policies- Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Significant Accounting Policies [Line Items]
Deferred revenue	$ 3,200,000	$ 3,200,000
Sales commissions	$ 302,000	218,000
Percentage of cash discount offered to customers	2.00%
Deferred tax assets, valuation allowance	$ 33,455,000	30,463,000
Convertible Debt	14,300,000
Impairment of Intangible Assets, Finite-lived	66,000
ABG [Member]
Significant Accounting Policies [Line Items]
Purchase Order Placed	3,300,000
Fulfillment Center [Member]
Significant Accounting Policies [Line Items]
Payments To Acquire of Inventory	33,000
Genetic Test Revenue [Member]
Significant Accounting Policies [Line Items]
Breakage Revenue	218,000	$ 309,000
Customer Payment [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	300,000
Kits Components [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	2,600,000
Distributors [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	$ 2,300,000