Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
Deferred tax assets
Amortization and impairment of intangible assets	$ 13,615	$ 18,261
Stock compensation	3,645	4,027
Deferred rent obligations	4,899	5,452
Acquisition costs	461	481
Uniform capitalization adjustment to inventory	3,965	3,212
Bad debt allowance and other reserves	11,932	12,939
State taxes	239	798
Accrued bonuses	7,350	7,573
Foreign currency translation	670	0
Other	745	0
Net operating loss carry-forwards, net of valuation allowances	807	863
Total	48,328	53,606
Deferred tax liabilities
Prepaid expenses	3,379	2,686
Depreciation of property and equipment	14,079	9,638
Foreign currency translation	0	1,700
Other	0	1,201
Total	17,458	15,225
Deferred tax assets, net	$ 30,870	$ 38,381