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Borrowings - Additional Information (Details) |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 01, 2020 USD ($) shares | Apr. 13, 2020 USD ($) | Jul. 31, 2019 USD ($) | Mar. 31, 2020 | Jun. 30, 2020 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Jan. 01, 2019 USD ($) Installment | Dec. 31, 2017 USD ($) FinancingArrangement
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Lines of credit repaid principal amount |  |  |  |  |  | $ 5,878,000 |  |  |  |
Proceeds from PPP Loan |  |  |  |  | $ 2,289,000 |  |  |  |  |
Other Financing Arrangements |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Number of financing arrangements | FinancingArrangement |  |  |  |  |  |  |  |  |  | 3
Debt instrument, face amount |  |  |  |  |  |  |  |  |  | $ 472,000
Other Financing Arrangement One |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, maturity date |  |  |  | 2020-06 |  |  |  |  |  |
Other Financing Arrangement Two |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, maturity date |  |  |  | 2020-08 |  |  |  |  |  |
Cares Act |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Proceeds from PPP Loan |  | $ 2,300,000 |  |  |  |  |  |  |  |
Loan and Security Agreement | East West Bank |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowings available |  |  |  |  |  |  | $ 0 |  |  |
Line of credit facility, cancellation date |  |  |  |  |  |  | Jun. 30, 2020 |  |  |
Subordinated Term Loan and Security Agreement | B. Riley Principal Investments, LLC |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowings available |  |  | $ 10,000,000 |  | 12,000,000 |  |  |  |  |
Minimum principal amount outstanding of defined repayment penalties |  |  |  |  |  |  |  | $ 10,000,000 |  |
Prepayment penalty description |  |  |  |  |  |  |  | The prepayment penalty was 1% for 2019 through maturity. |  |
Interest rate, stated percentage |  |  |  |  |  |  |  | 10.00% |  |
Debt prepayment penalties percentage |  |  |  |  |  |  |  | 1.00% |  |
Line of credit facility, maturity date |  |  |  |  |  |  |  | Sep. 01, 2022 |  |
Outstanding borrowings |  |  |  |  | 0 |  | $ 10,003,000 |  |  |
Lines of credit repaid principal amount |  |  | $ 3,250,000 |  |  |  |  |  |  |
Lines of credit repaid principal amount percentage |  |  | 25.00% |  |  |  |  |  |  |
Percentage of fee incurred |  |  | 2.00% |  |  |  |  |  |  |
Compounded interest |  |  |  |  | 166,000 |  |  |  |  |
Note Amendment and Debt Cancellation Agreement | B. Riley Principal Investments, LLC |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding indebtedness | $ 4,000,000 |  |  |  |  |  |  |  |  |
Outstanding borrowings | $ 6,170,000 |  |  |  |  |  |  |  |  |
Debt instrument redemption date | Jun. 09, 2020 |  |  |  |  |  |  |  |  |
Conversion shares | shares | 8,226,834 |  |  |  |  |  |  |  |  |
Promissory Notes Payable |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, outstanding balance |  |  |  |  | $ 472,000 |  | $ 508,000 |  | $ 736,000 |
Debt instrument, periodic payment, number of equal quarterly installments | Installment |  |  |  |  |  |  |  |  | 20 |
Debt instrument, frequency of periodic payment |  |  |  |  | quarterly |  |  |  |  |
Promissory Notes Payable | Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Debt instrument, payment term |  |  |  |  | 2 years |  |  |  |  |
Promissory Notes Payable | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate, stated percentage |  |  |  |  | 8.00% |  |  |  |  |
Debt instrument, payment term |  |  |  |  | 4 years |  |  |  |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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