4. BALANCE SHEET DETAIL - Accrued expenses and other liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Mar. 31, 2019
Accrued expenses and other liabilities:
Accrued compensation	$ 3,674	$ 4,659
Purchased intellectual property	2,432
Accrued professional fees	7	60
Accrued commissions	355	304
Contingent consideration		492
Accrued retention payment		415
Miscellaneous accrued expenses	833	939
Total accrued expenses and other liabilities	$ 7,301	$ 6,869