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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Debt and Related Warrants (Details) - USD ($)	1 Months Ended				3 Months Ended	6 Months Ended
Debt and Related Warrants (Details) - USD ($)	Dec. 31, 2020	Oct. 31, 2020	Apr. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2021	Jun. 30, 2020	Nov. 30, 2018
Line of Credit Facility [Line Items]
Proceeds from debt						$ 0	$ 23,302,000
Repayments of debt						$ 0	$ 6,302,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Proceeds from debt				$ 17,000,000
Repayments of debt		$ 17,000,000
Loan and Security Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity								$ 18,000,000
Second Amended and Restated Loan and Security Agreement
Line of Credit Facility [Line Items]
Warrants granted to purchase (in shares)	49,869
Warrants outstanding, term	10 years
Second Amended and Restated Loan and Security Agreement \| Minimum
Line of Credit Facility [Line Items]
Exercise price of warrants or rights (in dollars per share)	$ 0.525
Second Amended and Restated Loan and Security Agreement \| Maximum
Line of Credit Facility [Line Items]
Exercise price of warrants or rights (in dollars per share)	$ 10.80
Second Amended and Restated Loan and Security Agreement \| Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 40,000,000
Debt instrument, covenant, liquidity amount	$ 5,000,000
Debt instrument, covenant, adjusted EBITDA burn, term	6 months
Debt instrument, covenant, adjusted EBITDA burn, amount outstanding	$ 18,000,000
Debt instrument, basis spread on variable rate	0.25%
Outstanding line of credit	$ 0
Unused commitment fee percentage					0.25%
Second Amended and Restated Loan and Security Agreement \| Revolving Credit Facility \| LIBOR
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.50%
Paycheck Protection Program ("PPP")
Line of Credit Facility [Line Items]
Repayments of debt			$ 6,300,000
Debt instrument, face amount			$ 6,300,000