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v3.19.1

Stockholders' Equity and Stock-based Compensation (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Feb. 28, 2019 | Mar. 31, 2019 | Mar. 31, 2018
Shares issued of common stock, shares |  | 15,000 |
Commission expense |  | $ 75 |
Stock-based compensation |  | $ 713 | $ 751
Mayfield Pharmaceuticals, Inc. [Member] |  |  |
Number of shares issued for acquisition | 1,000,000 |  |
Ownership percentage | 72.00% |  |
2017 Incentive Stock and Awards Plan [Member] |  |  |
Maximum number of common stock issuance under the plan |  | 2,000,000 |
2017 Plan [Member] |  |  |
Number of shares issued |  | 1,146,640 |
Restricted Stock [Member] |  |  |
Shares issued of common stock, shares |  | 34,090 |
Stock Option Plan [Member] |  |  |
Closing price of common stock price per share |  | $ 4.98 |
Forfeiture factor, percentage |  | 10.00% |
Unrecognized compensation expense related to unvested stock options granted under the plan |  | $ 3,513 |
Expense expected to recognize over the weighted-average remaining vesting period |  | 1 year 3 months 19 days |
Stock-based compensation |  | $ 283 |
Stock Option Plan [Member] | Employees [Member] |  |  |
Stock options granted with exercise price contractual terms |  | 10 years |
Stock options granted vesting terms |  | Vesting terms for options granted to employees and consultants during the three months ended March 31, 2019 typically included one of the following vesting schedules: 25% of the shares subject to the option vest and become exercisable on the first anniversary of the grant date and the remaining 75% of the shares subject to the option vest and become exercisable quarterly in equal installments thereafter over three years; and 100% of the shares subject to the option vest on a quarterly basis in equal installments over three years. Certain option awards provide for accelerated vesting if there is a change in control (as defined in the Plan) and in the event of certain modifications to the option award agreement. |
Restricted Stock Units [Member] |  |  |
Shares issued of common stock, shares |  | 135,000 |
Fair market value of restricted shares |  | $ 851 |
Unvested RSUs [Member] |  |  |
Unrecognized compensation expense related to unvested stock options granted under the plan |  | $ 1,900 |
Expense expected to recognize over the weighted-average remaining vesting period |  | 3 months 19 days |
Stock-based compensation |  | $ 430 |
Common Stock Warrants [Member] |  |  |
Number of shares issued |  | 273,984 |
Exercise of warrants, shares |  | 384,000 |
Warrants exercise price |  | $ 1.79 |
Common Stock Warrants One [Member] |  |  |
Number of shares issued |  | 90,055 |
Exercise of warrants, shares |  | 90,055 |
Warrants exercise price |  | $ 1.79 |
Number of shares issued, avlue |  | $ 162 |

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