Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2021

Accounting Policies [Abstract]

Schedule of assets and liabilities measured at fair value on a recurring basis

The following tables sets forth by level within the fair value hierarchy our assets that are measured on a recurring basis and reported at fair value as of March 31, 2021 and December 31, 2020. Assets are classified in their entirety based on the lowest level of input that is significant to the fair value measurement.

	Fair Value Measurements as of
	March 31, 2021
	Estimated Fair Value		Level 1		Level 2		Level 3
Cash equivalents:
Money market funds	$	170,391	$	170,391	$	—	$	—
Total cash equivalents	170,391		170,391		—		—
Investments:
Commercial paper	$	13,286	$	—	$	13,286	$	—
Corporate bonds	6,506		—		6,506		—
U.S. government securities	24,004		24,004		—		—
Total investments	43,796		24,004		19,792		—
Total cash equivalents and investments	$	214,187	$	194,395	$	19,792	$	—

	Fair Value Measurements as of
	December 31, 2020
	Estimated Fair Value		Level 1		Level 2		Level 3
Cash equivalents:
Money market funds	$	179,389	$	179,389	$	—	$	—
Total cash equivalents	179,389		179,389		—		—
Investments:
Commercial paper	$	13,275	$	—	$	13,275	$	—
Corporate bonds	6,540		—		6,540		—
U.S. government securities	24,029		24,029		—		—
Total investments	43,844		24,029		19,815		—
Total cash equivalents and investments	$	223,233	$	203,418	$	19,815	$	—

Schedule of inventory

Inventories are valued at the lower of cost or net realizable value, computed on a first-in, first-out basis and consisted of the following:

	March 31, 2021		December 31, 2020
Raw materials	$	1,419	$	892
Finished goods	9,966		7,587
Total inventories, net of reserves	$	11,385	$	8,479

Schedule of property and equipment

Property and equipment are stated at cost, less accumulated depreciation and amortization and consisted of the following:

	March 31, 2021		December 31, 2020
Computer equipment and software	$	1,294	$	1,305
Manufacturing equipment	3,137		2,285
Other equipment	249		249
Leasehold improvements	264		192
Construction in process	3,915		3,125
Property and equipment, cost	8,859		7,156
Less: accumulated depreciation and amortization	(2,068)		(1,845)
Property and equipment, net	$	6,791	$	5,311

Schedule of accrued expenses

Accrued expenses consisted of the following:

	March 31, 2021		December 31, 2020
Payroll related	$	8,301	$	11,965
Interest	160		160
Other accrued expenses	1,904		1,391
Total accrued expenses	$	10,365	$	13,516