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6. INCOME TAXES - Unrecognized tax benefits (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2019 | Jun. 30, 2020
Unrecognized tax benefits, noncurrent |  | $ 0 | $ 613,000 |  |
Deferred tax assets unrecognized tax benefit |  | 3,300,000 | 2,700,000 |  |
Deferred tax assets, gross |  | 13,209,000 | 9,414,000 |  |
Valuation allowance |  | (13,017,000) | (9,389,000) |  |
Cash, cash equivalents and short-term and long-term investments |  | 59,700,000 |  |  |
Provision for income taxes |  | 335,000 | 247,000 | $ 105,000 |
Deferred tax liability |  | 9,000 | 7,000 |  |
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |  |  |
Unrecognized tax benefits, beginning of period |  | 3,321,000 | 3,102,000 | 2,735,000 |
Additions based on tax positions related to current year |  | 233,000 | 394,000 | 371,000 |
Additions based on tax positions related to prior years |  |  |  | 13,000 |
Settlements during the period |  | (203,000) |  |  |
Reductions based on tax positions related to prior years |  | (78,000) | (158,000) | (17,000) |
Lapses during the current year applicable to statutes of limitations |  |  | (17,000) |  |
Unrecognized tax benefits, end of period |  | 3,273,000 | $ 3,321,000 | $ 3,102,000 |
Accrued expenses and other liabilities |  |  |  |  |
Income taxes, accrued |  |  |  |  | $ 713,000
Israel Tax Authority [Member] |  |  |  |  |
Provision for income taxes |  | $ 479,000 |  |  |
Income tax payment | $ 713,000 |  |  |  |

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- Definition Amount of increase (decrease) on remeasurement in unrecognized tax benefits from effect of Tax Cuts and Jobs Act of 2017. + References No definition available. + Details
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). + 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 210.5-02.19,20) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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