Condensed Consolidated Statement of Shareholders' Equity (Parenthetical) $ in Thousands	9 Months Ended
Dec. 31, 2016 USD ($) $ / shares
Statement of Stockholders' Equity [Abstract]
Shares sold, price (in USD per share) \| $ / shares	$ 15.00
Underwriting discounts and commissions and offering expenses \| $	$ 17,536

Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs and Offering Expenses

No definition available.

Name:	axon_AdjustmentstoAdditionalPaidinCapitalStockIssuedIssuanceCostsandOfferingExpenses
Namespace Prefix:	axon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration