CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2018
ASSETS
Cash and cash equivalents	$ 42,495	$ 40,241
Short-term investments	19,346	18,124
Accounts receivable, net	7,339	5,279
Inventories	5,685	5,547
Prepaid expenses and other current assets	2,500	2,080
Total current assets	77,365	71,271
Property and equipment, net	9,001	8,172
Long-term investments	8,997	7,923
Goodwill	7,978	7,978
Intangible assets, net	2,722	2,989
Other assets	160	1,207
Total assets	106,223	99,540
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	1,864	1,841
Accrued expenses and other liabilities	6,869	5,563
Total current liabilities	8,733	7,404
Income taxes payable	622	619
Other accrued expenses	3,713	4,702
Total liabilities	13,068	12,725
Commitments and contingencies (Note 8)
Stockholders' equity:
Preferred stock: $0.001 par value authorized: 5,000,000 shares; issued and outstanding: none
Common Stock: $0.001 par value authorized: 150,000,000 shares; issued and outstanding: 22,320,156 and 21,407,247 shares, respectively	22	21
Additional paid-in capital	33,462	27,391
Accumulated other comprehensive loss	(37)	(142)
Retained earnings	59,708	59,545
Total stockholders' equity	93,155	86,815
Total liabilities and stockholders' equity	$ 106,223	$ 99,540