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Restructuring Costs Restructuring Costs (Notes)	9 Months Ended
	Jan. 31, 2020
Restructuring and Related Activities [Abstract]
Restructuring Costs	Restructuring Costs In December 2019, the Company initiated a restructuring, which included the addition of a new Vice President of Information Technology to lead the transformation and modernization of the Company's information systems, and a reduction in workforce primarily in its domestic operations to reduce operating expenses on an ongoing basis. This restructuring also included a plan for closure of the Company’s subsidiary in China, a commercial sales organization for the Company’s products in China. For the three months ended January 31, 2020, the Company incurred restructuring expenses of $628,000. The domestic restructuring expenses of $374,000 consisted primarily of severance and expenses related to hiring and relocation of the new Vice President of Information Technology. For the three months ended January 31, 2020, the Company incurred expenses in its international operations related to the closure of the China subsidiary of $254,000, which consisted primarily of bad debt expenses of $220,000 with a concurring increase in the Company’s allowance for doubtful accounts and severance expenses. The Company reflected substantially all the expenses as operating expenses in the condensed statement of operations and recorded $117,000 of accrued employee compensation liabilities related to severance agreements in the condensed consolidated balance sheets.

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- Definition

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-URI http://asc.fasb.org/topic&trid=2175745

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