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INCOME TAX: (Tables)
12 Months Ended
Mar. 31, 2022
Income Tax Disclosure [Abstract]  
Schedule of Total Income Tax Expense (Benefit) Total income tax expense (benefit) was allocated as follows (dollars in thousands):
Year ended March 31,
202220212020
Continuing operations$(1,242)$(30,532)$(40,276)
Discontinued operations— 207 
$(1,242)$(30,532)$(40,069)
Schedule of Components of Income Tax Expense (Benefit)
Income tax expense (benefit) attributable to loss from continuing operations consists of (dollars in thousands): 
Year ended March 31,
202220212020
Current:
U.S. Federal$(1,227)$(28,060)$(33,715)
Non-U.S.305 17 146 
State1,220 (1,071)171 
298 (29,114)(33,398)
Deferred:
U.S. Federal(895)(1,205)(5,103)
Non-U.S.(608)(44)(1,006)
State(37)(169)(769)
(1,540)(1,418)(6,878)
Total$(1,242)$(30,532)$(40,276)
Schedule of Income before Income Tax, Domestic and Foreign Income (loss) before income tax attributable to U.S. and non-U.S. continuing operations consists of (dollars in thousands):
Year ended March 31,
202220212020
U.S.$(37,415)$(122,257)$(160,457)
Non-U.S.2,340 1,457 (5,080)
Total$(35,075)$(120,800)$(165,537)
Schedule of Effective Income Tax Rate Reconciliation
Below is a reconciliation of expected income tax benefit computed by applying the U.S. federal statutory rate of 21.0% to loss before income taxes to actual income tax benefit from continuing operations (dollars in thousands): 
Year ended March 31,
202220212020
Computed expected income tax benefit$(7,366)$(25,368)$(34,763)
Increase (reduction) in income taxes resulting from:
State income taxes, net of federal benefit691 (979)(473)
Research and other tax credits(3,107)(4,635)(1,517)
Nondeductible expenses673 1,104 838 
Stock-based compensation5,576 (2,024)5,025 
Non-U.S. subsidiaries taxed at other rates(364)194 230 
Adjustment to valuation allowances2,520 2,230 (2,245)
Net operating loss carryback taxed at other rates— — (7,360)
Other, net135 (1,054)(11)
$(1,242)$(30,532)$(40,276)
Schedule of Deferred Tax Assets and Liabilities
The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and liabilities at March 31, 2022 and 2021 are presented below (dollars in thousands).  
20222021
Deferred tax assets:
Accrued expenses$5,682 $3,501 
Lease liabilities14,090 3,324 
Net operating loss carryforwards25,737 35,945 
Stock-based compensation8,022 2,991 
Nonqualified deferred compensation3,119 2,802 
Property and equipment496 — 
Tax credit carryforwards7,588 10,241 
Other1,351 444 
Total deferred tax assets66,085 59,248 
Less valuation allowance(37,399)(35,332)
Net deferred tax assets28,686 23,916 
Deferred tax liabilities:
Prepaid expenses(2,296)(6,734)
Property and equipment— (248)
Right-of-use assets(13,691)(3,016)
Intangible assets(4,218)(8,409)
Deferred commissions(7,562)(5,391)
Total deferred tax liabilities(27,767)(23,798)
Net deferred tax assets$919 $118 
Schedule of Unrecognized Tax Benefits Roll Forward The following table sets forth changes in the total gross unrecognized tax benefits for the fiscal years ended March 31, 2022, 2021 and 2020 (dollars in thousands):
Year ended March 31,
202220212020
Balance at beginning of period$25,026 $23,400 $19,600 
Increases related to prior year tax positions411 — 2,458 
Decreases related to prior year tax positions— (139)(1,048)
Increases related to current year tax positions990 1,765 2,433 
Lapse of statute of limitations(2,610)— (43)
Balance at end of period$23,817 $25,026 $23,400