Leases - Additional Information (Detail)			3 Months Ended
	Feb. 01, 2019 USD ($)	Jan. 31, 2019 USD ($) mo	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Jan. 01, 2019 USD ($)	Dec. 31, 2018 USD ($)
Leases [Line Items]
Finance lease right-of-use assets			$ 1,476,804
Financed equipment						$ 2,573,955
Total proceeds from equipment financing commitment	$ 149,000
Finance lease transaction, frequency of payments		monthly
Finance lease transaction, number of installments payments | mo		36
Finance lease transaction, montly installments of principal and interest payments		$ 5,013
Finance lease transaction, total amount to be repaid		$ 180,000
Finance lease transaction, commitment period		2022-02
Operating lease monthly payments			355,812
Operating lease, right-of-use asset			1,635,476
Operating lease liability			$ 1,869,133
Finance lease, weighted average remaining lease term			3 years 4 months 13 days
Operating lease, weighted average remaining lease term			1 year 4 months 2 days
Finance lease, weighted average discount rate, percent			19.65%
Operating lease, weighted average discount rate, percent			4.50%
Right of use assets in exchange for finance lease liabilities			$ 149,000
ASC Topic 842 [Member]
Leases [Line Items]
Finance lease right-of-use assets					$ 1,400,000
Financed equipment			2,723,000			2,574,000
Accumulated depreciation related to financed equipment			1,246,000			$ 1,135,000
Depreciation expense related to financed equipment			$ 110,000	$ 67,000
Operating lease transaction, frequency of payments			monthly cash payment
Operating lease monthly payments			$ 120,000
Operating lease term			Jul. 31, 2020
Operating lease, right-of-use asset					1,930,000
Operating lease liability					$ 2,201,000
Operateing lease incremental borrowing rate					4.50%
ASC Topic 842 [Member] | Net Machinery and Equipment [Member]
Leases [Line Items]
Finance lease right-of-use assets					$ 1,400,000
Minimum [Member] | ASC Topic 842 [Member]
Leases [Line Items]
Financed equipment useful life			3 years
Maximum [Member] | ASC Topic 842 [Member]
Leases [Line Items]
Financed equipment useful life			7 years