Liquidity (Details Narrative) - USD ($) $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 21, 2020 |
Jan. 31, 2020 |
Sep. 30, 2019 |
Nov. 30, 2018 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Apr. 20, 2020 |
Mar. 31, 2020 |
Nov. 30, 2019 |
Jul. 31, 2019 |
Dec. 31, 2017 |
|
| Cash and cash equivalents | $ 2,321 | $ 6,068 | $ 2,321 | $ 6,068 | |||||||||||||||
| Accounts receivable, net | 10,197 | 9,483 | 10,197 | 9,483 | |||||||||||||||
| Total current assets | 16,369 | 17,721 | 16,369 | 17,721 | |||||||||||||||
| Total current liabilities | 17,298 | 8,492 | 17,298 | 8,492 | |||||||||||||||
| Net loss | 10,725 | $ 7,362 | $ 5,220 | $ 3,419 | 4,037 | $ 3,042 | $ 1,917 | $ 3,193 | 26,727 | 12,189 | |||||||||
| Net cash used in operating activities | 18,957 | 8,673 | |||||||||||||||||
| Line of credit facility | 3,000 | 3,000 | |||||||||||||||||
| Public offering generating net proceeds | $ 200 | ||||||||||||||||||
| Sale of common stock | 97,817 | ||||||||||||||||||
| Stockholder's equity increased | $ 23,597 | 13,026 | $ 23,597 | $ 30,829 | $ 35,771 | $ 32,938 | $ 35,372 | $ 38,552 | $ 39,765 | $ 13,026 | $ 32,938 | $ 39,869 | |||||||
| Silicon Valley Bank [Member] | |||||||||||||||||||
| Line of credit facility | $ 850 | $ 3,000 | $ 3,000 | ||||||||||||||||
| Line of credit facility term loan | 3 years | ||||||||||||||||||
| Line of credit facility, description | The proceeds of the term loan are expected to be used for laboratory capital expenditures and will be repaid monthly. The balance of the Line of Credit is available for working capital purposes as a revolving line of credit and has a three-year term. The borrowing limit of the revolving line of credit is the lower of 80% of the Company's eligible accounts receivable (as adjusted by SVB) and the aggregate amount of cash collections with respect to accounts receivable during the three prior calendar months. | The amount that may be borrowed under the Revolving Line is the lower of (i) $3.75 million or (ii) 80% of the Company's eligible accounts receivable (as adjusted by SVB). Revolving Line outstanding amounts incur interest at a rate per annum equal to the Wall Street Journal Prime Rate plus 0.5%. The Company is also required to pay an unused Revolving Line facility fee monthly in arrears in an amount equal to 0.35% per annum of the average unused but available portion of the Revolving Line. The term loan portion of the SVB Loan Agreement has a maturity date of May 2, 2022, and the Revolving Line has a maturity date three years from the effective date, or November 13, 2021 | |||||||||||||||||
| Line of credit, percentage | 0.50% | ||||||||||||||||||
| Silicon Valley Bank [Member] | Prime Rate [Member] | |||||||||||||||||||
| Line of credit, percentage | 5.00% | 0.50% | |||||||||||||||||
| Silicon Valley Bank [Member] | Maximum [Member] | |||||||||||||||||||
| Line of credit facility | $ 4,000 | ||||||||||||||||||
| Subsequent Event [Member] | |||||||||||||||||||
| Line of credit facility | $ 350 | ||||||||||||||||||
| Stockholder's equity increased | $ 47,000 | ||||||||||||||||||
| Description for loans to qualifying businesses value and its term | As of April 20, 2020, the Company's PPP loan has not yet been approved, pending new legislation increasing the pool. The PPP provides for loans to qualifying businesses for amounts up to 2.5 times of the average monthly payroll expenses of the qualifying business. The PPP loans and accrued interest are forgivable after eight weeks as long as the borrower uses the loan proceeds for eligible purposes, including payroll, benefits, rent and utilities, and maintains its payroll levels. The amount of loan forgiveness will be reduced if the borrower terminates employees or reduces salaries during the eight-week period. The unforgiven portion of the PPP loan is payable over two years at an interest rate of 1%, with a deferral of payments for the first six months. If the Company is successful in obtaining a PPP loan, we intend to use the proceeds for purposes consistent with the PPP and expect to meet the conditions for forgiveness of the loan. | ||||||||||||||||||
| Cash | $ 18,400 | ||||||||||||||||||
| Subsequent Event [Member] | Credit Facility [Member] | |||||||||||||||||||
| Cash | $ 3,400 | ||||||||||||||||||
| Subsequent Event [Member] | Maximum [Member] | Credit Facility [Member] | |||||||||||||||||||
| Cash | 8,000 | 8,000 | |||||||||||||||||
| Subsequent Event [Member] | Minimum [Member] | Credit Facility [Member] | |||||||||||||||||||
| Cash | 4,000 | 4,000 | |||||||||||||||||
| Subsequent Event [Member] | Preferred Stock [Member] | |||||||||||||||||||
| Public offering generating net proceeds | $ 19,500 | ||||||||||||||||||
| Sale of common stock | 20,000 | ||||||||||||||||||
| Security Purchase and Exchange Agreement [Member] | |||||||||||||||||||
| Line of credit facility | $ 4,000 | ||||||||||||||||||
| Equity Distribution Agreement [Member] | |||||||||||||||||||
| Public offering generating net proceeds | $ 4,800 | ||||||||||||||||||
| ATM Agreement [Member] | |||||||||||||||||||
| Public offering generating net proceeds | $ 8,000 | ||||||||||||||||||
| Small Business Administration [Member] | Subsequent Event [Member] | |||||||||||||||||||
| Loans payable | 3,500 | ||||||||||||||||||
| Department of Health and Human Services [Member] | Subsequent Event [Member] | |||||||||||||||||||
| Loans payable | 650 | ||||||||||||||||||
| Proceeds from loans payable | 650 | ||||||||||||||||||
| Centers for Medicare & Medicaid Services [Member] | Subsequent Event [Member] | |||||||||||||||||||
| Loans payable | $ 2,100 | ||||||||||||||||||
| Proceeds from loans payable | $ 2,100 | ||||||||||||||||||