Quarterly report pursuant to Section 13 or 15(d)

Uncategorized Items - visi-20200202.xml

v3.20.1
Label Element Value
Accounting Standards Update 2014-09 [Member] | Retained Earnings [Member]  
Cumulative Effect of New Accounting Principle in Period of Adoption us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption $ 426,000