Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019 USD ($) Lease Installment Customer	Dec. 31, 2018 USD ($)
Commitments And Contingencies [Line Items]
Number of operating leases for real estate | Lease	3
Right-of-use assets	$ 717,000
Operating lease liabilities	$ 1,085,000
Rent expense		$ 322,000
Supplier Concentration Risk [Member] | Vendor One [Member] | Cost of Goods Total [Member]
Commitments And Contingencies [Line Items]
Concentration risk percentage	10.00%	21.00%
Number of customers accounted for more than 10% | Customer	0
Biomedical Market [Member] | Customer Concentration Risk [Member] | Major customer 1 [Member] | Sales Revenue Segment [Member]
Commitments And Contingencies [Line Items]
Concentration risk percentage	37.00%	33.00%
Biomedical Market [Member] | Customer Concentration Risk [Member] | Major customer 2 [Member] | Sales Revenue Segment [Member]
Commitments And Contingencies [Line Items]
Concentration risk percentage	15.00%	24.00%
Astellas Pharma [Member]
Commitments And Contingencies [Line Items]
Minimum license fee payable	$ 75,000
Number of installments per year | Installment	2
Carlsbad, California [Member]
Commitments And Contingencies [Line Items]
Operating leases with term date	2020-02
Oceanside
Commitments And Contingencies [Line Items]
Operating leases with term date	2021-12
Option to terminate of lease upon six-month advanced notice	Jan. 01, 2020
Advanced notice required to terminate lease	6 months
Frederick, Maryland [Member]
Commitments And Contingencies [Line Items]
Operating leases with term date	2025-11