5. PROPERTY AND EQUIPMENT

9 Months Ended

Jan. 31, 2019

Property, Plant and Equipment [Abstract]

PROPERTY AND EQUIPMENT

5.       PROPERTY AND EQUIPMENT

Property and equipment is recorded at cost, less accumulated depreciation and amortization. Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the related asset, generally ranging from three to ten years. Amortization of leasehold improvements is calculated using the straight-line method over the shorter of the estimated useful life of the asset or the remaining lease term. Construction-in-progress, which represents direct costs related to the construction of various equipment and leasehold improvements associated with our manufacturing facilities, are not depreciated until the asset is completed and placed into service. No interest was incurred or capitalized as construction-in-progress as of January 31, 2019 and April 30, 2018. All of our property and equipment are located in the U.S.

Property and equipment, net, consists of the following:

	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

Depreciation and amortization expense for the three and nine months ended January 31, 2019 was $681 and $2,006, respectively. Depreciation and amortization expense for the three and nine months ended January 31, 2018 was $645 and $1,945, respectively.