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Borrowings - PPP Loan - Additional Information (Detail) - USD ($)		6 Months Ended
	Apr. 10, 2020	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Proceeds from Paycheck Protection Program loan		$ 4,873,000
Short-term notes payable		5,387,000	$ 5,028,000
Paycheck Protection Program loan — long term		$ 2,030,000
US Small Business Administration
Debt Instrument [Line Items]
Maximum payroll cost exclude compensation of individual employee	$ 100,000
Forgiveness reduction in case of reduction in salaries and wages of employees with	$ 100,000
US Small Business Administration | Maximum
Debt Instrument [Line Items]
Percentage of non payroll costs	40.00%
Percentage of decrease in salaries and wages for employees	25.00%
PPP Loan
Debt Instrument [Line Items]
Proceeds from Paycheck Protection Program loan	$ 4,900,000
Maturity date	Apr. 09, 2022
Annual interest rate	0.98%	0.98%
Debt instrument, date of first required interest payment	Nov. 09, 2020
Debt instrument principal payment	$ 1,400,000
Debt instrument, payment terms	On November 9, 2020, the Company may be required to pay the lender $1.4 million of principal and interest, including six months of payments deferred in accordance with the terms of the PPP Loan, and equal monthly payments of principal and interest thereafter as required to fully amortize the remaining principal amount by April 9, 2022
Debt instrument, prepayment penalties	$ 0
Short-term notes payable		$ 2,900,000
Paycheck Protection Program loan — long term		$ 2,000,000.0

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