Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Assets:
Amortized Cost	$ 16,196	$ 15,449
Gross Unrealized Loss	0	0
Gross Unrealized Gain	34	11
Estimated Fair Value	16,230	15,460
Liabilities:
Amortized Cost	1,436	700
Gross Unrealized Loss	0	0
Gross Unrealized Gain	34	11
Estimated Fair Value	1,470	711
Level 1:
Assets:
Amortized Cost	11,901	4,765
Gross Unrealized Loss	0	0
Gross Unrealized Gain	34	11
Estimated Fair Value	11,935	4,776
Liabilities:
Amortized Cost	836	100
Gross Unrealized Loss	0	0
Gross Unrealized Gain	34	11
Estimated Fair Value	870	111
Level 1: | Money market funds
Assets:
Amortized Cost	11,068	4,676
Gross Unrealized Loss	0	0
Gross Unrealized Gain	0	0
Estimated Fair Value	11,068	4,676
Level 1: | Securities Held In Deferred Compensation Plan
Assets:
Amortized Cost	833	89
Gross Unrealized Loss	0
Gross Unrealized Gain	34	11
Estimated Fair Value	867	100
Level 1: | Deferred Compensation Plan Liabilities
Liabilities:
Amortized Cost	836	100
Gross Unrealized Loss	0	0
Gross Unrealized Gain	34	11
Estimated Fair Value	870	111
Level 2:
Assets:
Amortized Cost	4,295	10,684
Gross Unrealized Loss	0	0
Gross Unrealized Gain	0	0
Estimated Fair Value	4,295	10,684
Level 2: | Commercial paper
Assets:
Amortized Cost	4,295	4,999
Gross Unrealized Loss	0	0
Gross Unrealized Gain	0	0
Estimated Fair Value	4,295	4,999
Level 2: | Corporate notes and bonds
Assets:
Amortized Cost		1,085
Gross Unrealized Loss		0
Gross Unrealized Gain		0
Estimated Fair Value		1,085
Level 2: | US Treasuries
Assets:
Amortized Cost		4,600
Gross Unrealized Loss		0
Gross Unrealized Gain		0
Estimated Fair Value		4,600
Fair Value, Inputs, Level 3
Liabilities:
Amortized Cost	600	600
Gross Unrealized Loss	0	0
Gross Unrealized Gain	0	0
Estimated Fair Value	600	600
Fair Value, Inputs, Level 3 | Contingent Consideration
Liabilities:
Amortized Cost	600	600
Gross Unrealized Loss	0	0
Gross Unrealized Gain	0	0
Estimated Fair Value	$ 600	$ 600