Property and Equipment. net - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Property Plant And Equipment [Line Items]
Depreciation expense			$ 931,000	$ 384,000
Capitalized implementation cost, net		$ 220,000		$ 220,000
Capitalized implementation cost, amortization method				The capitalized costs are amortized on a straight-line basis over the non-cancelable contract terms, generally three years.
Capitalized implementation cost, amortization period		3 years		3 years
Capitalized implementation cost, current		$ 138,000		$ 138,000	$ 46,000
Capitalized implementation cost, noncurrent		0		0	$ 87,000
Operating Expense
Property Plant And Equipment [Line Items]
Depreciation expense	$ 271,000	131,000	688,000	316,000
Cost of Goods Sold
Property Plant And Equipment [Line Items]
Depreciation expense	87,000	$ 25,000	243,000	$ 68,000
Selling, General and Administrative Expenses
Property Plant And Equipment [Line Items]
Capitalized implementation cost, amortization	$ 27,000		$ 66,000