For work performed Dec. 9 through Dec. 23, 2018: Full, 10-day paycheck.
For paid vacation Dec. 24 through Dec. 28, 2018. The week from Dec. 31 through Jan. 4 was unpaid. The result is 50% of gross pay. Your net pay will likely be less than 50% of normal net, due to insurance and other regular withholdings.