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Summary of Significant Accounting Policies (Policies) | 6 Months Ended
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Oct. 31, 2020
Accounting Policies [Abstract] |
Consolidation | (a) Consolidation The accompanying consolidated financial statements include the accounts of the Company and its majority-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.
Use of Estimates | (b) Use of Estimates The preparation of the consolidated financial statements requires management of the Company to make a number of estimates and assumptions relating to the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the period. Significant items subject to such estimates and assumptions include estimated costs to complete projects; and the input method used to measure completion over time of customer contracts for purposes of revenue recognition. Actual results could differ from those estimates.
Cash, Cash Equivalents, Restricted Cash and Security Agreements | (c) Cash, Cash Equivalents, Restricted Cash and Security Agreements Cash and Cash Equivalents The Company considers all highly liquid investments with a maturity of three months or less when purchased to be cash equivalents. The Company invests excess cash in a money market account.
|  | October 31, 2020 |  |  | April 30, 2020 |
|  | (in thousands) |
Checking and savings accounts |  | $ | 2,369 |  |  | $ | 1,551 |
Money market account |  |  | 12,875 |  |  |  | 8,451 |
|  | $ | 15,244 |  |  | $ | 10,002 |
Restricted Cash and Security Agreements The Company has two agreements with Santander Bank. Cash is on deposit at Santander Bank and serves as security for a letter of credit issued by Santander Bank for the lease of warehouse/office space in Monroe Township, New Jersey. This agreement cannot be extended beyond July 31, 2025 and is cancelable at the discretion of the bank. Santander Bank also issued two letters of credit to subsidiaries of Enel Green Power (“EGP”) pursuant to the Company’s contracts with EGP. The first letter of credit was issued in the amount of $125,690 that expires in May 2021. The second letter of credit was issued in the amount of $645,467 and reduced to $322,734 in August 2020. This second letter of credit will be reduced to $64,547 in January 2021. The remaining amount expires in December 2021. Restricted cash includes the following:
|  | October 31, 2020 |  |  | April 30, 2020 |
|  | (in thousands) |
Santander Bank |  |  | 606 |  |  |  | 928 |
|  | $ | 606 |  |  | $ | 928 |
The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the Statement of Financial Position that sum to the total of the same such amounts shown in the Statement of Cash Flows.
|  | October 31, 2020 |  |  | April 30, 2020 |
|  | (in thousands) |
Cash and cash equivalents |  | $ | 15,244 |  |  | $ | 10,002 |
Restricted cash- short term |  |  | 384 |  |  |  | 707 |
Restricted cash- long term |  |  | 222 |  |  |  | 221 |
|  | $ | 15,850 |  |  | $ | 10,930 |
Concentration of Credit Risk | (d) Concentration of Credit Risk Financial instruments that potentially subject the Company to credit risk consist principally of accounts receivable and cash and cash equivalents. The Company believes that its credit risk is limited because the Company’s current contracts are with companies with strong financial strength. The Company invests its excess cash in a money market account and does not believe that it is exposed to any significant risks related to its cash and money market accounts. Cash and cash equivalents are also maintained at foreign financial institutions. Cash and cash equivalents in foreign financial institutions as of October 31, 2020 was $0.3 million. The table below shows the percentage of the Company’s revenues derived from customers whose revenues accounted for at least 10% of the Company’s consolidated revenues for at least one of the periods indicated:
|  | Three months ended October 31, |  |  | Six months ended October 31, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
Eni S.p.A. |  |  | 61 | % |  |  | 23 | % |  |  | 34 | % |  |  | 19 | %
Premier Oil UK Limited |  |  | 0 | % |  |  | 13 | % |  |  | 9 | % |  |  | 30 | %
EGP |  |  | 36 | % |  |  | 47 | % |  |  | 55 | % |  |  | 24 | %
U.S. Navy |  |  | 0 | % |  |  | 10 | % |  |  | 0 | % |  |  | 17 | %
Other |  |  | 3 | % |  |  | 7 | % |  |  | 2 | % |  |  | 10 | %
|  |  | 100 | % |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
The loss of or a significant reduction in revenues from a current customer could significantly impact the Company’s financial position or results of operations. The Company does not require its customers to maintain collateral.
Share-Based Compensation | (e) Share-Based Compensation Costs resulting from all share-based payment transactions are recognized in the consolidated financial statements at their fair values. The following table summarizes share-based compensation related to the Company’s share-based plans by expense category for the three and six months ended October 31, 2020 and 2019:
|  | Three months ended October 31, |  |  | Six months ended October 31, |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
|  | (in thousands) |
Engineering and product development |  | $ | 22 |  |  | $ | 20 |  |  | $ | 59 |  |  | $ | 40 |
Selling, general and administrative |  |  | 85 |  |  |  | 56 |  |  |  | 164 |  |  |  | 128 |
Total share-based compensation expense |  | $ | 107 |  |  | $ | 76 |  |  | $ | 223 |  |  | $ | 168 |
Revenue Recognition | (f) Revenue Recognition A performance obligation is the unit of account for revenue recognition. The Company assesses the goods or services promised in a contract with a customer and identifies as a performance obligation either: a) a good or service (or a bundle of goods or services) that is distinct; or b) a series of distinct goods or services that are substantially the same and that have the same pattern of transfer to the customer. A contract may contain a single or multiple performance obligations. For contracts with multiple performance obligations, the Company allocates the contracted transaction price to each performance obligation based upon the relative standalone selling price, which represents the price the Company would sell a promised good or service separately to a customer. The Company determines the standalone selling price based upon the facts and circumstances of each obligated good or service. The majority of the Company’s contracts have no observable standalone selling price since the associated products and services are customized to customer specifications. As such, the standalone selling price generally reflects the Company’s forecast of the total cost to satisfy the performance obligation plus an appropriate profit margin. The nature of the Company’s contracts may give rise to several types of variable consideration, including unpriced change orders and liquidated damages and penalties. Variable consideration can also arise from modifications to the scope of services. Variable consideration is included in the transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur once the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include such amounts in the transaction price are based largely on our assessment of legal enforceability, performance and any other information (historical, current, and forecasted) that is reasonably available to us. Accounting Standards Update (“ASU”) 2016-10 provides a practical expedient that permits presentation of shipping and handling costs, that occur after control of the promised goods or services transfer to the customer, as fulfillment costs rather than evaluating whether the shipping and handling activities are promised services to the customer. The Company adopted this practical expedient, but it did not have a material effect on its Consolidated Financial Statements. The Company recognizes revenue when or as it satisfies a performance obligation by transferring a good or service to a customer, either (1) at a point in time or (2) over time. A good or service is transferred when or as the customer obtains control of it. The evaluation of whether control of each performance obligation is transferred at a point in time or over time is made at contract inception. Input measures such as costs incurred or time elapsed are utilized to assess progress against specific contractual performance obligations for the Company’s services. The selection of the method to measure progress towards completion requires judgment and is based on the nature of the services to be provided. For the Company, the input method using costs incurred or time elapsed best represents the measure of progress against the performance obligations incorporated within the contractual agreements. When the Company’s estimate of total costs to be incurred to satisfy the performance obligations exceed revenue, the Company recognizes the loss immediately. The Company’s contracts are either cost plus or fixed price contracts. Under cost plus contracts, customers are billed for actual expenses incurred plus an agreed-upon fee. Under cost plus contracts, a profit or loss on a project is recognized depending on whether actual costs are more or less than the agreed upon amount. The Company has two types of fixed price contracts, firm fixed price and cost-sharing. Under firm fixed price contracts, the Company receives an agreed-upon amount for providing products and services specified in the contract, a profit or loss is recognized depending on whether actual costs are more or less than the agreed upon amount. Under cost-sharing contracts, the fixed amount agreed upon with the customer is only intended to fund a portion of the costs on a specific project. Under cost sharing contracts, an amount corresponding to the revenue is recorded in cost of revenues, resulting in gross profit on these contracts of zero. The Company’s share of the costs is recorded as product development expense. The Company reports its disaggregation of revenue by contract type since this method best represents the Company’s business. For the six-month periods ended October 31, 2020 and 2019, all of the Company’s contracts were classified as firm fixed price. As of October 31, 2020, the Company’s total remaining performance obligations, also referred to as backlog, totaled $0.8 million. The Company expects to recognize approximately 93%, or $0.7 million, of the remaining performance obligations as revenue over the next twelve months. Products and Solutions Leasing The Company enters into lease arrangements with certain customers for their products and solutions. As of October 31, 2020, the Company has one lease arrangement with a remaining operating lease term of less than 13 months. Revenue related to multiple-element arrangements is allocated to lease and non-lease elements based on their relative standalone selling prices or expected cost plus a margin approach. Lease elements generally include a PB3 and components, while non-lease elements generally include engineering, monitoring and support services. In the lease arrangement, the customer is provided an option to extend the lease term or purchase the leased PB3 at some point during and/or at the end of the lease term. The Company classifies leases as either operating or financing in accordance with the authoritative accounting guidance contained within ASC Topic 842, “Leases”. At inception of the contract, the Company evaluates the lease against the lease classification criteria within ASC Topic 842. If the direct financing or sales-type classification criteria are met, then the lease is accounted for as a finance lease. All others are treated as an operating lease. The Company recognizes revenue from operating lease arrangements generally on a straight-line basis over the lease term and is presented in Revenues in the Consolidated Statement of Operations. The lease income for the three and six months ended October 31, 2020 and 2019 was immaterial.
Net Loss Per Common Share | (g) Net Loss per Common Share Basic and diluted net loss per share for all periods presented is computed by dividing net loss by the weighted average number of shares of common stock and common stock equivalents outstanding during the period. The pre-funded warrants were determined to be common stock equivalents and have been included in the weighted average number of shares outstanding for calculation of the basic earnings per share number. Due to the Company’s net losses, potentially dilutive securities, consisting of options to purchase shares of common stock, warrants on common stock and non-vested restricted stock issued to employees and non-employee directors, were excluded from the diluted loss per share calculation due to their anti-dilutive effect. In computing diluted net loss per share on the Consolidated Statement of Operations, warrants on common stock, options to purchase shares of common stock and non-vested restricted stock issued to employees and non-employee directors, totaling 5,540,469 and 5,007,907 for the three and six months ended October 31, 2020 and 2019, respectively, were excluded from each of the computations as the effect would be anti-dilutive due to the Company’s losses.
Recently Issued Accounting Standards | (h) Recently Issued Accounting Standards In June 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-13, “Financial Instruments - Credit Losses (Topic 326), Measurement of Credit Losses on Financial Instruments.” The amendment in this update replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses on instruments within its scope, including trade receivables. This update is intended to provide financial statement users with more decision-useful information about the expected credit losses. In November 2019, the FASB issued No. 2019-10, Financial Instruments—Credit Losses (Topic 326), Derivatives and Hedging (Topic 815), and Leases (Topic 842), which deferred the effective date of ASU 2016-13 for Smaller Reporting Companies for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. The Company is currently evaluating the impact the adoption of ASU 2016-13 will have on its consolidated financial statements. In August 2018, the FASB issued ASU No. 2018-13, “Fair Value Measurement (Topic 820).” The ASU modifies, removes, and adds several disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement. The amendments on changes in unrealized gains and losses, the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements, and the narrative description of measurement uncertainty should be applied prospectively for only the most recent interim or annual period presented in the initial fiscal year of adoption. All other amendments should be applied retrospectively to all periods presented upon their effective date. The Company adopted this guidance effective May 1, 2020. The adoption of the guidance did not have a material effect on its Consolidated Financial Statements. In August 2018, the FASB issued ASU No. 2018-15, “Intangibles — Goodwill and Other — Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract.” The ASU requires a customer in a cloud computing arrangement that is a service contract to follow the internal-use software guidance in Accounting Standards Codification 350-40 to determine which implementation costs to defer and recognize as an asset. The ASU permits two methods of adoption: prospectively to all implementation costs incurred after the date of adoption, or retrospectively to each prior reporting period presented. The Company adopted this guidance on a prospective basis effective May 1, 2020. The adoption of the guidance did not have a material effect on its Consolidated Financial Statements.

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- Definition Entity's cash and cash equivalents accounting policy with respect to restricted balances. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(1)(a)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4273-108586 + Details
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