XML 32 R21.htm IDEA: XBRL DOCUMENT
v3.21.2

COSTS AND ESTIMATED EARNINGS IN EXCESS OF BILLINGS, NET (Tables) | 6 Months Ended
--- | ---
Oct. 31, 2021
Contractors [Abstract] |
Costs and Estimated Earnings in Excess of Billings, Net [Table Text Block] | At October 31, 2021 and April 30, 2021, billings in excess of costs and estimated earnings and costs and estimated earnings in excess of billings, net, respectively, consisted of the following:
|  | October 31, 2021 |  |  | April 30, 2021 |
|  | (In thousands) |
Costs and estimated earnings in excess of billings |  | $ | 9,882 |  |  | $ | 12,640 |
Billings in excess of costs and estimated earnings |  |  | (13,361 | ) |  |  | (10,692 | )
Net (liability) asset |  | $ | (3,479 | ) |  | $ | 1,948 |

X
- Definition Tabular disclosure of information pertaining to costs and estimated earnings in excess of billings, net. + References No definition available. + Details
Name: | feim_CostsAndEstimatedEarningsInExcessOfBillingsNetTableTextBlock
Namespace Prefix: | feim_
Data Type: | dtr:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ContractorsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration