Please assess the completion status of the following clinical trial:

Trial Title: Risky Decision Making in Methamphetamine Users: The Role of Opioid Blockade

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: OTHER
- Time Perspective: None
- Masking: TRIPLE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Summary Inclusion Criteria:~* Diagnostic and Statistical Manual (DSM)-IV Methamphetamine Dependence~* Deemed healthy enough to participate by study physician~* Age 18-55~* Right handed~* English-speaking~Summary Exclusion Criteria:~* Current opioid use in the last 30 days; opioid abuse or dependence within past 5 years~* Pregnancy~* MRI contraindications (e.g. metal in head).~The research is conducted in Portland, OR.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 55 Years
- Healthy Volunteers: f

Study Arms:
- Extended release naltrexone (Type: EXPERIMENTAL): One dose of intramuscular injection of 380mg extended-release naltrexone.
- Placebo (Type: PLACEBO_COMPARATOR): One dose of intramuscular injection of placebo.

Based on this trial design, predict the completion outcome and termination type (if applicable).