ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - IPO (Details) $ / shares in Units, $ in Millions |
3 Months Ended | ||
|---|---|---|---|
|
May 16, 2019
shares
|
Mar. 31, 2019
USD ($)
$ / shares
shares
|
Dec. 31, 2018
shares
|
|
| IPO | |||
| Convertible preferred stock, outstanding (in shares) | 7,538,671 | 7,095,746 | |
| IPO | |||
| IPO | |||
| Shares issued (in shares) | 4,000,000 | ||
| Issue price (in dollars per share) | $ / shares | $ 10.00 | ||
| Aggregate gross proceeds from issuance | $ | $ 40.0 | ||
| Net proceeds after deducting underwriting discounts and commissions and estimated offering costs | $ | $ 34.0 | ||
| Stock split ratio | 55.2486 | ||
| Number of shares into which convertible preferred stock is converted | 7,538,671 | ||
| Number of shares issued for each share of convertible preferred stock converted | 1 | ||
| Convertible preferred stock, outstanding (in shares) | 0 |