Note 12. Investments (Tables)

3 Months Ended

Sep. 30, 2020

Investments [Abstract]

Schedule of Contractual Maturities on Investments

The contractual maturities of our investment portfolio were as follows: 

	September 30, 2020
(Amounts in Thousands)	Certificates of Deposit		U.S. Treasury Securities
Within one year	$	3,519	$	10,000
After one year through two years	—		—
Total Fair Value	$	3,519	$	10,000

Unrealized Gain (Loss) on Investments

	September 30, 2020
(Amounts in Thousands)	Certificates of Deposit		U.S. Treasury Securities
Amortized cost basis	$	3,500	$	10,000
Unrealized holding gains	19		—
Unrealized holding losses	—		—
Fair Value	$	3,519	$	10,000
	June 30, 2020
(Amounts in Thousands)	Certificates of Deposit		U.S. Treasury Securities
Amortized cost basis	$	5,250	$	—
Unrealized holding gains	44		—
Unrealized holding losses	—		—
Fair Value	$	5,294	$	—

Trading Securities (and Certain Trading Assets)

SERP asset and liability balances were as follows:

(Amounts in Thousands)	September 30, 2020		June 30, 2020
SERP investments - current asset	$	3,861	$	3,622
SERP investments - other long-term asset	8,847		8,353
Total SERP investments	$	12,708	$	11,975
SERP obligation - current liability	$	3,861	$	3,622
SERP obligation - other long-term liability	8,847		8,353
Total SERP obligation	$	12,708	$	11,975