Debt (Narrative) (Details)	12 Months Ended
Dec. 31, 2020
Issuance Of Common Stock And Warrants, Shares
Debt, Description	On December 11, 2020, the Company entered into a Securities Purchase Agreement (the "Lind Securities Purchase Agreement") with Lind Global Asset Management II, LLC (the "Investor") pursuant to which, among other things, on December 11, 2020, the Company issued and sold to the Investor, in a private placement transaction, in exchange for the payment by the Investor of $10,000,000, (1) a convertible promissory note (the "Note") in an aggregate principal amount of $12,000,000 (the "Principal Amount"), which will bear no interest and mature on December 11, 2022 (the "Maturity Date"), and (2) 975,000 shares of the Company's common stock. At any time following June 11, 2021, and from time to time before the Maturity Date, the Investor shall have the option to convert any portion of the then-outstanding Principal Amount of the Note into shares of common stock at a price per share of $1.60, subject to adjustment for stock splits, reverse stock splits, stock dividends and similar transactions (the "Conversion Price"). Prior to June 11, 2021, the Company will have the right to prepay up to sixty-six and two-thirds percent (662/3%) of the then-outstanding Principal Amount of the Note with no penalty. On or after July 11, 2021, the Company will have the right to prepay up to the then-outstanding Principal Amount of the Note with no penalty; however, if the Company exercises such prepayment right, the Investor will have the option to convert up to thirty-three and one-third percent (331/3%) of the amount that the Company elects to prepay at the Conversion Price. Subject to certain exceptions, the Company will be required to direct proceeds from any subsequent debt financings (including subordinated debt, convertible debt or mandatorily redeemable preferred stock but other than purchase money debt or capital lease obligations or other indebtedness incurred in the ordinary course of business) to repay the Note, unless waived by the Investor in advance. Beginning on June 9, 2021, the Note will amortize in eighteen monthly installments equal to the quotient of (i) the then-outstanding Principal Amount of the Note, divided by (ii) the number of months remaining until the Maturity Date. All amortization payments shall be payable solely in cash, plus a 2% premium. On December 17, 2020, the Company entered into three separate securities purchase agreements with certain accredited investors on substantially the same terms as the Lind Securities Purchase Agreement (the "December 17 SPAs"), pursuant to which the Company sold, in private placement transactions, in exchange for the payment by the accredited investors of an aggregate of $1,138,023, (1)convertible promissory notes (the "December 17 Notes") in an aggregate principal amount of $1,365,628, which will bear no interest and mature on December 17, 2022, and (2) an aggregate of 110,956 shares of its common stock. On December 18, 2020, the Company entered into an additional securities purchase agreement with an accredited investor on substantially the same terms as the Lind Securities Purchase Agreement (the "December 18 SPA") and, together with the December 17 SPAs, (the "Subsequent Securities Purchase Agreements"), pursuant to which the Company sold, in a private placement transaction, in exchange for the payment by the accredited investor of $269,373, (1) a convertible promissory note in an aggregate principal amount of $323,247, which will bear no interest and mature on December 18, 2022 (the "December 18 Note" and, together with the December 17 Notes, the "Subsequent Notes"), and (2) 26,263 shares of the Company's common stock. The Subsequent Securities Purchase Agreements have substantially the same terms as the Lind Securities Purchase Agreement, and the Subsequent Notes have substantially the same terms as the Note. The Company received aggregate net proceeds of $10.9 million from the convertible note offerings, net of $0.5 million of issuance costs. The total gross proceeds were allocated to the convertible notes and common stock issued under the agreements based on their relative fair values. The Company recognized a beneficial conversion feature discount on the convertible notes of approximately $0.1 million. The discount on the convertible notes is being amortized to interest expense, using the effective interest method over the term of the convertible notes. As of December 31, 2020, the principal balance of the convertible notes outstanding and the unamortized discount on the convertible notes is approximately $13.7 million and $4.1 million, respectively. Interest expense recognized related to the discount was approximately $0.2 million for the year ended December 31, 2020. Convertible Notes From May 2017 to October 2018, the Company issued convertible notes (the "Convertible Notes"). The aggregate principal amount of the Convertible Notes was $2.3 million, and the Convertible Notes were due no later than April 30, 2019 with simple interest at the rate of 8% per annum. The Convertible Notes provided that they were to convert at a discount of 10% or 20% depending on the terms for each note, or $9.70 to $10.91 per share, respectively. The Convertible Notes were carried at fair value. The Company recognized an adjustment relating to changes in the Convertible Notes fair value of $0 and $109 thousand during the year ended December 31, 2020 and 2019, respectively. In connection with the closing of the Merger, the Convertible Notes plus unpaid interest were converted into 172,284 shares of common stock at a price of $9.70 or $10.91 per share. PPP Loan On May 4, 2020, the Company qualified for and received a loan pursuant to the Paycheck Protection Program, a program implemented by the U.S. Small Business Administration under the Coronavirus Aid, Relief, and Economic Security Act, from a qualified lender (the "PPP Lender"), for an aggregate principal amount of approximately $147,000 (the "PPP Loan"). The PPP Loan bears interest at a fixed rate of 1.0% per annum, with the first six months of interest deferred, has a term of two years, and is unsecured and guaranteed by the U.S. Small Business Administration. The principal amount of the PPP Loan is subject to forgiveness under the Paycheck Protection Program upon the Company's request to the extent that the PPP Loan proceeds are used to pay expenses permitted by the Paycheck Protection Program, including payroll costs, covered rent and mortgage obligations and covered utility payments incurred by the Company. The Company intends to apply for forgiveness of the PPP Loan with respect to these covered expenses. To the extent that all or part of the PPP Loan is not forgiven, the Company will be required to pay interest on the PPP Loan at a rate of 1.0% per annum, and commencing in the fourth quarter of 2020, principal and interest payments will be required through the maturity date in May 2022. The terms of the PPP Loan provide for customary events of default including, among other things, payment defaults, breach of representations and warranties and insolvency events. The obligation to repay the PPP Loan may be accelerated upon the occurrence of an event of default.

Debt (Narrative) (Details)

12 Months Ended

Dec. 31, 2020

Issuance Of Common Stock And Warrants, Shares

On December 11, 2020, the Company entered into a Securities Purchase Agreement (the "Lind Securities Purchase Agreement") with Lind Global Asset Management II, LLC (the "Investor") pursuant to which, among other things, on December 11, 2020, the Company issued and sold to the Investor, in a private placement transaction, in exchange for the payment by the Investor of $10,000,000, (1) a convertible promissory note (the "Note") in an aggregate principal amount of $12,000,000 (the "Principal Amount"), which will bear no interest and mature on December 11, 2022 (the "Maturity Date"), and (2) 975,000 shares of the Company's common stock. At any time following June 11, 2021, and from time to time before the Maturity Date, the Investor shall have the option to convert any portion of the then-outstanding Principal Amount of the Note into shares of common stock at a price per share of $1.60, subject to adjustment for stock splits, reverse stock splits, stock dividends and similar transactions (the "Conversion Price"). Prior to June 11, 2021, the Company will have the right to prepay up to sixty-six and two-thirds percent (662/3%) of the then-outstanding Principal Amount of the Note with no penalty. On or after July 11, 2021, the Company will have the right to prepay up to the then-outstanding Principal Amount of the Note with no penalty; however, if the Company exercises such prepayment right, the Investor will have the option to convert up to thirty-three and one-third percent (331/3%) of the amount that the Company elects to prepay at the Conversion Price. Subject to certain exceptions, the Company will be required to direct proceeds from any subsequent debt financings (including subordinated debt, convertible debt or mandatorily redeemable preferred stock but other than purchase money debt or capital lease obligations or other indebtedness incurred in the ordinary course of business) to repay the Note, unless waived by the Investor in advance. Beginning on June 9, 2021, the Note will amortize in eighteen monthly installments equal to the quotient of (i) the then-outstanding Principal Amount of the Note, divided by (ii) the number of months remaining until the Maturity Date. All amortization payments shall be payable solely in cash, plus a 2% premium. On December 17, 2020, the Company entered into three separate securities purchase agreements with certain accredited investors on substantially the same terms as the Lind Securities Purchase Agreement (the "December 17 SPAs"), pursuant to which the Company sold, in private placement transactions, in exchange for the payment by the accredited investors of an aggregate of $1,138,023, (1)convertible promissory notes (the "December 17 Notes") in an aggregate principal amount of $1,365,628, which will bear no interest and mature on December 17, 2022, and (2) an aggregate of 110,956 shares of its common stock. On December 18, 2020, the Company entered into an additional securities purchase agreement with an accredited investor on substantially the same terms as the Lind Securities Purchase Agreement (the "December 18 SPA") and, together with the December 17 SPAs, (the "Subsequent Securities Purchase Agreements"), pursuant to which the Company sold, in a private placement transaction, in exchange for the payment by the accredited investor of $269,373, (1) a convertible promissory note in an aggregate principal amount of $323,247, which will bear no interest and mature on December 18, 2022 (the "December 18 Note" and, together with the December 17 Notes, the "Subsequent Notes"), and (2) 26,263 shares of the Company's common stock. The Subsequent Securities Purchase Agreements have substantially the same terms as the Lind Securities Purchase Agreement, and the Subsequent Notes have substantially the same terms as the Note. The Company received aggregate net proceeds of $10.9 million from the convertible note offerings, net of $0.5 million of issuance costs. The total gross proceeds were allocated to the convertible notes and common stock issued under the agreements based on their relative fair values. The Company recognized a beneficial conversion feature discount on the convertible notes of approximately $0.1 million. The discount on the convertible notes is being amortized to interest expense, using the effective interest method over the term of the convertible notes. As of December 31, 2020, the principal balance of the convertible notes outstanding and the unamortized discount on the convertible notes is approximately $13.7 million and $4.1 million, respectively. Interest expense recognized related to the discount was approximately $0.2 million for the year ended December 31, 2020. Convertible Notes From May 2017 to October 2018, the Company issued convertible notes (the "Convertible Notes"). The aggregate principal amount of the Convertible Notes was $2.3 million, and the Convertible Notes were due no later than April 30, 2019 with simple interest at the rate of 8% per annum. The Convertible Notes provided that they were to convert at a discount of 10% or 20% depending on the terms for each note, or $9.70 to $10.91 per share, respectively. The Convertible Notes were carried at fair value. The Company recognized an adjustment relating to changes in the Convertible Notes fair value of $0 and $109 thousand during the year ended December 31, 2020 and 2019, respectively. In connection with the closing of the Merger, the Convertible Notes plus unpaid interest were converted into 172,284 shares of common stock at a price of $9.70 or $10.91 per share. PPP Loan On May 4, 2020, the Company qualified for and received a loan pursuant to the Paycheck Protection Program, a program implemented by the U.S. Small Business Administration under the Coronavirus Aid, Relief, and Economic Security Act, from a qualified lender (the "PPP Lender"), for an aggregate principal amount of approximately $147,000 (the "PPP Loan"). The PPP Loan bears interest at a fixed rate of 1.0% per annum, with the first six months of interest deferred, has a term of two years, and is unsecured and guaranteed by the U.S. Small Business Administration. The principal amount of the PPP Loan is subject to forgiveness under the Paycheck Protection Program upon the Company's request to the extent that the PPP Loan proceeds are used to pay expenses permitted by the Paycheck Protection Program, including payroll costs, covered rent and mortgage obligations and covered utility payments incurred by the Company. The Company intends to apply for forgiveness of the PPP Loan with respect to these covered expenses. To the extent that all or part of the PPP Loan is not forgiven, the Company will be required to pay interest on the PPP Loan at a rate of 1.0% per annum, and commencing in the fourth quarter of 2020, principal and interest payments will be required through the maturity date in May 2022. The terms of the PPP Loan provide for customary events of default including, among other things, payment defaults, breach of representations and warranties and insolvency events. The obligation to repay the PPP Loan may be accelerated upon the occurrence of an event of default.