Common Stock (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions				12 Months Ended
	Aug. 19, 2022	May 19, 2020	Apr. 11, 2016	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Feb. 05, 2020
Class Of Stock [Line Items]
Common stock, par value				$ 0.001	$ 0.001
Reclassified to additional paid in capital from redeemable common stock				$ 5.6
Executed Under Share Repurchase Authorizations [Member] | Common Stock [Member]
Class Of Stock [Line Items]
Shares repurchased				0	0	0
Executed Under Share Repurchase Authorizations [Member] | Maximum [Member] | Common Stock [Member]
Class Of Stock [Line Items]
Stock repurchase program authorized amount							$ 100.0
IFC Investors [Member] | Subsequent Event [Member]
Class Of Stock [Line Items]
Number of shares sold	514,376
IFC Investors [Member] | Minimum [Member]
Class Of Stock [Line Items]
Percentage of common stock ownership for right to nominate one director			5.00%
Percentage of common stock ownership for right to appoint observer			2.50%
IFC Investors [Member] | Preemptive Rights [Member]
Class Of Stock [Line Items]
Percentage of ownership for right to purchase pro-rata share			5.00%
IFC Investors [Member] | Subscription Agreement [Member]
Class Of Stock [Line Items]
Number of shares sold			9,980,000
Common stock, par value			$ 0.001
Common stock repurchase per share			$ 10.79
Cash consideration received on transaction			$ 107.7
IFC Investors [Member] | Subscription Agreement [Member] | Redeemable Common Stock [Member]
Class Of Stock [Line Items]
Number of shares sold			9,980,000
IFC Investors [Member] | Put Option [Member]
Class Of Stock [Line Items]
Percentage of ownership to adopt shareholder rights plan			20.00%
Number of trading days preceding triggering event			60 days
Africa Capitalization Fund, Ltd [Member] | Put Option [Member]
Class Of Stock [Line Items]
Number of shares sold		2,103,169
Cash consideration received on transaction					$ 22.7