5. PROPERTY AND EQUIPMENT (Tables)

9 Months Ended

Jan. 31, 2019

Property, Plant and Equipment [Abstract]

Schedule of property and equipment

	January 31, 2019			April 30, 2018
Leasehold improvements	$	20,648		$	20,686
Laboratory and manufacturing equipment		12,427			10,258
Furniture, fixtures, office equipment and software		5,210			4,597
Construction-in-progress		1,656			3,310
Total property and equipment		39,941			38,851
Less accumulated depreciation and amortization		(14,065	)		(12,372	)
Total property and equipment, net	$	25,876		$	26,479