IDT Corp (IDT) shares tumbled 6.15% in after-hours trading on Monday following the release of its fourth-quarter financial results. The company's earnings fell short of analyst expectations, despite beating revenue estimates.

IDT reported adjusted earnings per share (EPS) of $0.76 for the fourth quarter, significantly missing the analyst estimate of $0.91. This earnings miss appears to be the primary driver behind the stock's sharp decline. On a more positive note, the company's sales for the quarter came in at $316.600 million, surpassing the estimated $310.000 million.

Other key financial metrics for the quarter included: - Net income of $16.9 million - Operating income of $22 million - Adjusted EBITDA of $33 million While IDT managed to beat revenue expectations, the substantial earnings miss seems to have overshadowed the positive sales performance, leading to the after-hours sell-off. Investors may be concerned about the company's profitability and efficiency in converting sales into earnings, despite the revenue growth.