$PSID Bookings represent signed purchase orders or

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$PSID Bookings represent signed purchase orders or contracts received from customers. PositiveID recognizes revenue on booked contracts once the vehicle is built and delivered to the customer. More than half of ENG’s bookings for the first half of 2017 are for its MobiLab™ mobile lab vehicles.

https://finance.yahoo.com/news/positiveid-e-n...00986.html
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