Regulation S-X Rule 5-02.3 asks commercial companies to show receivables by source: trade customers, related parties, underwriters, promoters and employees (for amounts that arose outside the ordinary course of business), and others. Other receivables correspond to the last of these groups. In XBRL, companies commonly tag the net current balance as OtherReceivablesNetCurrent or NontradeReceivablesCurrent, and use OtherReceivables when the amount is not split between current and noncurrent.
The "net" refers to the allowance for credit losses. Under ASC 326, the current expected credit loss model, a company estimates the losses it expects over the life of its receivables and carries them net of that estimate. For many non-trade items, such as government tax refunds, the expected loss is small, so the gross and net figures are close.
Other receivables are usually minor, but a balance that grows quickly deserves a look at the footnote. Large vendor rebates receivable, amounts owed by a buyer after a divestiture, or receivables from related parties can carry different collection risk from customer invoices. Because these items are not generated by sales, they should be left out of receivables-based ratios such as days sales outstanding.