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Revenue
 6 Months Ended
Sep. 30, 2023
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
The following table provides information regarding the Company’s revenue for each of the services it provides pursuant to its spectrum revenue agreements for the three and six months ended September 30, 2023 and 2022 (in thousands):
 Three months ended September 30,Six months ended September 30,
 2023202220232022
Spectrum revenues
900 MHz Broadband Spectrum Revenue
Ameren Corporation$152$152$304$305
Evergy (1)
2746454864
Xcel Energy (2)
444—444—
Narrowband Spectrum Revenue
Motorola182182364364
Total spectrum revenue (3)
$1,052$398$1,660$733
1.The Company commenced revenue recognition in connection with the delivery of cleared 900 MHz Broadband Spectrum and the associated broadband licenses to Evergy, Inc. (“Evergy”) during the three months ended September 2022.
2.The Company commenced revenue recognition in connection with the delivery of cleared 900 MHz Broadband Spectrum and the associated broadband licenses to Xcel Energy during the three months ended September 2023.
3.Revenue recognized during the three and six months ended September 30, 2023 and 2022 was included in deferred revenue at the beginning of the respective periods.
Spectrum Revenue Agreements
Refer to the Company’s 2023 Annual Report for a description of the Company’s spectrum revenue agreements entered into prior to March 31, 2023.
Contract Assets and Liabilities
The Company recognizes a contract asset for the incremental costs of obtaining a contract with a customer. Contract liabilities primarily relate to advance consideration received from customers for spectrum services, for which revenue is recognized over time, as the services are performed.
The Company’s contract assets consisted of the following activity during the six months ended September 30, 2023 and 2022 (in thousands):
 20232022
Balance at the beginning of the period$870$638
Additions 3362
Amortization(19)(7)
Balance at the end of the period884693
Less amount classified as current assets (1)
(423)(300)
Noncurrent assets (1)
$461$393
1.Current assets are recorded as prepaid expenses and other current assets and noncurrent assets are recorded as other assets on the Company’s Consolidated Balance Sheets.
The Company’s contract liabilities consisted of the following activity during the six months ended September 30, 2023 and 2022 (in thousands):
 20232022
Balance at the beginning of the period$60,759$54,678
Additions (1)
21,166—
Revenue recognized(1,660)(733)
Balance at the end of the period80,26553,945
Less amount classified as current liabilities (2)
(5,281)(2,514)
Noncurrent liabilities (2)
$74,984$51,431
1.The Company delivered the cleared 3 x 3 900 MHz Broadband Spectrum and the associated broadband licenses for 14 counties in Xcel Energy’s service territory and received the full milestone payment of $21.2 million.
2.Current liabilities and noncurrent liabilities are recorded as deferred revenue on the Company’s Consolidated Balance Sheets.